one embodiment of a frozen filled waffle according to the present invention is generally shown at 10 in fig1 . in this embodiment , the waffle 10 is shown as a freezer stable , ready to toast batter - based filled waffle having a round perimeter . fig2 shows an alternative embodiment of the waffle 10 ′ as having a square perimeter . other polygonal shapes of the perimeter may also be used including rectangular . the waffle 10 can be removed from the freezer and heated in a toaster for consumption . the waffle 10 includes an outer casing material 12 formed from a batter having a moisture content of from about 30 to 65 % by weight . a filling material 14 having a moisture content of from about 5 to 40 % by weight is disposed inside the outer casing material 12 . in all embodiments , the moisture content of the filling material 14 is always lower than that of the outer casing material 12 . the waffle 10 includes the usually configuration of webbing 11 , the thinnest portions of the waffle , produced by a waffle iron . the aforementioned water content of the waffle 10 is desirable because the consumer perceives the moisture as part of the initial flavor and as part of a pleasing mouth texture . the filled waffle 10 of the present invention provides the ability to include a high moisture content in the casing material 12 and filling material 14 without adversely affecting the taste and texture due to water migration between the two materials . to manage the migration of water between the casing material 12 and the filling material 14 during cooking and storage , the casing material 12 is formulated to have a higher water activity level than the filling material 14 . preferably , the water activity level for the filling material 14 ranges from about 0 . 70 to 0 . 95 , especially when no antimicrobial steps or treatments are used in the formulation . more preferably , the water activity of the filling material 14 ranges from about 0 . 80 to 0 . 90 . the water activity level of the outer casing material 12 will range from about 0 . 90 and 0 . 99 . the filling material 14 acts as a moisture sink when formulated to have a water activity less than that of the casing material 12 . therefore , free water in the casing material 12 will migrate to the filling material 14 . this reduces the potential for water migration from the filling material 14 to the casing material 12 , which would result in discoloration and moistening of the casing material 12 and a loss of the quantity and quality of the filling 14 . antimicrobial steps include , for example , cold temperature storage , heat sterilization , aseptic packaging , chemical preservatives , or combinations of these steps . in another embodiment , one or more of these antimicrobial steps are utilized and this allows the water activity level of the casing material 12 to range from 0 . 92 to 0 . 99 and the water activity level of the filling material 14 to range from 0 . 6 to 0 . 95 . the casing material 12 must have suitable structural characteristics to resist breaking and / or distorting during manufacturing , packaging , shipping , and final toasting during consumer use . the casing material 12 must support the filling material 14 as the filled waffle 10 sits on its edge when it is heated in the toaster . the casing material 12 must also be strong enough to support itself while being held at an edge during extraction from the toaster . when preparing the filled waffle 10 , a first layer 25 of outer casing material 12 is formed by pouring the batter onto a cooking surface . the first layer 25 rapidly begins to cook . the filling material 14 is then deposited centrally onto the first layer 25 and a second layer 26 of casing material 12 batter is poured over the filling material 14 concealing the filling material 14 between the first and second layers 25 , 26 . it is important that the filling material 14 not be placed too close to the edges of the layers 25 and 26 or the filling material 14 could leak out on to the baking surface causing burning and production difficulties . a typical waffle has webbing 11 with a thickness of from 0 . 06 to 0 . 18 inches . to accommodate the filling material 14 , it is necessary to increase the thickness of the webbing 11 in the region of the filling material 14 to about from 0 . 1 to 0 . 3 inches . the filled waffle 10 is generally cooked at a temperature ranging from 120 ° c . to 250 ° c . the cooking cycle generally ranges from 50 seconds to 240 seconds depending upon the chosen cooking temperature . the waffle grid formed into the first and second layers 25 , 26 by the webbing 11 shown in fig1 and 2 is important for several reasons . first , the grid adds strength to the structure so it will sit upright in a toaster . second , the grid allows for good penetration of heat to the filling material 14 , especially in the places where the waffle 10 is the thinnest . the on edge height of the waffle 10 according to the present invention must exceed 9 . 0 cm to enable the consumer to grab an edge of the waffle 10 for extraction from a typical toaster . however , the height of the waffle 10 must not exceed 15 . 0 cm or it will be too large to fully fit into most upright toasters . the thickness of the waffle 10 can range from about 1 . 2 cm to roughly 2 . 0 cm . if the weight of the waffle 10 significantly exceeds 60 grams the spring mechanism on a standard upright consumer toaster will not be able to eject the waffle 10 resulting in a charred or burned waffle 10 . structural integrity of the casing material 12 is derived from the multiple layers and the dimensional design , such as , for example , the waffle ribbing . however , other methods well known in the art of toaster products can be utilized to derive structural integrity . the filling material 14 may comprise any of a large variety of fillings and flavors . in a first category the filling material may be a sweet filling comprising a fruit based filling , a cream cheese based filling , a sweet flavored filling , or mixtures of these . the fruit based filling may be any fruit such as apple , strawberry , blueberry , grape , apricot , etc . the fruit based filling can also be ajelly or jam type material in combination with peanut butter . alternatively , the filling material 14 may be peanut butter alone . any variety of plain or flavored cream cheese may be used , especially fruit and cream cheese mixtures . the filling material 14 may also comprise a sweet flavored filling such as , for example , honey , chocolate flavor , vanilla , vanilla cream , butter , maple , cinnamon , brown sugar , mixtures of these and any other sweet flavored filling . these flavors may be used in combination with the other sweet flavors above . in a second category the filling material 14 can comprise a savory type filling such as a cheese , tomato , tomato and herbs , tomato sauce , vegetables , cheese and vegetable combinations , bacon , ham , pork sausage , beef sausage , meat analogs , and mixtures of these . shown in table 1 is a typical formulation range for the components of the filling material 14 , reported as percent by weight based on the total weight of the filling material 14 , deposited between the layers 25 , 26 of a waffle when the filling material 14 is a fruit based filling : the sweeteners preferably are chosen from , but are not limited to , sucrose , dextrose , fructose , lactose , malt syrup , malt syrup solids , rice syrup solids , rice syrup , invert sugar , refiners syrup , corn syrup , corn syrup solids , maltose , high fructose corn syrup , honey , glycerrhizin , arabinose , galactose , glucose , mannitol , maple syrup , ribose , saccharin , xylose , molasses , artificial sweeteners or mixtures thereof . these sweeteners come in many forms including liquid and dry forms . one of ordinary skill in the art would chose the most appropriate form , dry being used to further reduce the water activity of the material and improve other key attributes . the fruit source is preferably chosen from , but is not limited to , fruit flakes , dry fruit flakes , fruit puree , puree concentrate , juice , juice concentrate , fresh fruit , frozen fruit , fruit concentrate , or mixtures thereof . the starch preferably is chosen from , but is not limited to , natural or modified starches , cornstarch , waxy cornstarch , rice starch , wheat starch , tapioca starch , potato starch , arrowroot starch , maize starch , oat starch , and mixtures thereof . as would be understood by one of ordinary skill in the art , the term modified starch as used in the present specification and claims is intended to mean chemically modified starches , cold water swelling starches , and pregelatinized starches regardless of the starch source . these modified starches can be beneficial in increasing freezer stability or other processing requirements . the fat is chosen from , but is not limited to , non - hydrogenated vegetable oil , non - hydrogenated shortening , partially hydrogenated vegetable oil , partially hydrogenated shortening , fully hydrogenated vegetable oil , fully hydrogenated shortening , soybean oil , cottonseed oil , canola oil , peanut oil , safflower oil , sunflower oil , coconut oil , palm oil , palm kernel oil , olive oil , butterfat oil , cocoa butter oil , tallow , lard , corn oil , or mixtures thereof . the natural and artificial flavors preferably are chosen from , but are not limited to , natural fruit , artificial fruit , fruit concentrate , honey , cinnamon , cocoa , caramel powder , maple syrup , spices , herbs , chocolate flavor , vanilla , vanilla cream , or mixtures thereof . the emulsifier preferably is chosen from , but is not limited to the following emulsifiers , glycerol esters , diacetyl tartaric acids , esters of monoglycerides , mono and di - glycerides , polyglycerol esters , polysorbate , propylene glycol esters , rice extract esters , sodium stearoyl - 2 - lactylate , sorbitan esters , lecithins , sugar esters , acetylated monoglycerides , or mixtures thereof . the acidulants preferably are chosen from , but not limited to , citric acid , malic acid , tartaric acid , lactic acid , acetic acid , phosphoric acid , adipic acid , glucono delta lactone acid , fumaric acid , succinic acid , tarenic acid , or mixtures thereof . the hydrocolloid gum preferably is chosen from , but is not limited to , pectin , guar , locust bean , tara , gellan , alginate , tragacanth , karaya , ghatti , agar , gelatin , arabic , acacia , carrageenan , xantham , cellulose , carboxymethylcellulose , hydroxypropylmethocellulose , or mixtures thereof . the sweeteners , humectants , modified starches , and gums trap moisture in the filling material 14 , which reduces and manages the formation of water crystals when the filled waffle 10 is frozen by forming a viscous mass with the water . further , the viscous mass prohibits moisture from migrating into the casing material 12 . the salt preferably is chosen from , but is not limited to , sodium chloride , potassium chloride , calcium chloride , and mixtures thereof . the coloring preferably is chosen from , but is not limited to , natural or artificial coal tar dyes , lake colorants , grape skin extracts , grape concentrate , purple carrot concentrate , fruit juice extracts , fruit juice concentrates , vegetable juice extracts , vegetable juice concentrates , beet , carmine , cochineal extracts , annatto , paprika , turmeric , beta carotene , purple potato , radish , anthocyanins , betaine , caramel , carmine , carotenoids , or mixtures thereof . the antimyotic preservatives when used are preferably chosen from , but are not limited to , sodium benzoate , potassium sorbate , sodium propionate , calcium propionate , or mixtures thereof . the humectants preferably are chosen from , but are not limited to , glycerin , sorbitol , fructose , propylene glycol , and mixtures thereof . the fortificants preferably are chosen from , but are not limited to , ascorbic acid , beta carotene , biotin , calcium pantothenate , choline , folic acid , niacin , vitamin a , vitamin b 1 , vitamin b 2 , vitamin b 6 , vitamin b 12 , vitamin d 2 , niacinamide , vitamin d 3 , vitamin e , vitamin k , boron , calcium , chromium , copper , iodine , iron , magnesium , molybdenum , nickel , potassium , selenium , vanadium , zinc , calcium citrate , calcium gluconate , calcium lactate , calcium caseinate , calcium chloride , calcium citrate malate , calcium glycerophosphate , calcium hydroxide , calcium malate , calcium stearate , calcium sulfate , or mixtures thereof . the protein source preferably is chosen from , but is not limited to , egg albumen , whey protein , soy protein , vital wheat gluten , peanut protein , pea protein , or mixtures thereof . shown in table 2 is a typical batter formulation range that might be used to form the outer casing material 12 of a waffle 10 prepared according to the present invention , all weights are as percent by weight based on the total weight of the casing material 12 : the flour preferably is chosen from , but is not limited to , all - purpose flour , hard wheat flour , soft wheat flour , whole wheat flour , corn flour , oat flour , rice flour , barley flour , or mixtures thereof . the egg preferably is chosen from , but is not limited to , liquid whole egg , dry whole egg , liquid egg whites , dry egg whites or mixtures thereof . the fat preferably is chose from , but is not limited to , non - hydrogenated vegetable oil , non - hydrogenated shortening , partially hydrogenated vegetable oil , partially hydrogenated shortening , fully hydrogenated vegetable oil , fully hydrogenated shortening , soybean oil , cottonseed oil , canola oil , peanut oil , safflower oil , sunflower oil , coconut oil , palm oil , palm kernel oil , olive oil , butterfat oil , cocoa butter oil , tallow , lard , corn oil , or mixtures thereof . the milk product preferably is chosen from , but is not limited to , nonfat dry milk , whole milk solids , casein , hydrolyzed milk protein , milk protein isolate , whole milk , partially defatted milk , skim milk , whey , whey products , or mixtures thereof . the sweetener preferably is chosen from , but is not limited to , sucrose , dextrose , fructose , lactose , malt syrup , malt syrup solids , rice syrup solids , rice syrup , invert sugar , malt syrup , malt syrup solids , refiners syrup , corn syrup , corn syrup solids , maltose , high fructose corn syrup , honey , molasses , glycerrhizin , arabinose , galactose , glucose , mannitol , maple syrup , ribose , saccharin , xylose , artificial sweeteners , or mixtures thereof . the sodium bicarbonate preferably is chosen from , but is not limited to , ammonium bicarbonate , potassium bicarbonate , sodium bicarbonate , or mixtures thereof . the leavening acid preferably is chosen from , but is not limited to , fumaric acid , adipic acid , aceteic acid , tartaric acid , monocalcium phosphate monohydrate , anhydrous monocalcium phosphate , anhydrous dicalcium phosphate , dicalcium phosphate dihydrate , sodium acid pyrophosphate , sodium aluminum phosphate , monoaluminum phosphate , dialuminum phosphate , monoammonium phosphate , diammonium phosphate , sodium aluminum sulfate , or mixtures thereof . the salt preferably is chosen from , but is not limited to , sodium chloride , potassium chloride , calcium chloride , or mixtures thereof . the fortificants preferably are chosen from , but are not limited to , ascorbic acid , beta carotene , biotin , calcium pantothenate , choline , folic acid , niacin , vitamin a , vitamin b 1 , vitamin b 2 , vitamin b 6 , vitamin b 12 , vitamin d 2 , niacinamide , vitamin d 3 , vitamin e , vitamin k , boron , calcium , chromium , copper , iodine , iron , magnesium , molybdenum , nickel , potassium , selenium , vanadium , zinc , calcium citrate , calcium gluconate , calcium lactate , calcium caseinate , calcium chloride , calcium citrate malate , calcium glycerophosphate , calcium hydroxide , calcium malate , calcium stearate , calcium sulfate , or mixtures thereof . the colorant preferably is chosen from , but is not limited to , natural color , artificial color , or mixtures thereof . the protein source preferably is chosen from , but is not limited to , egg albumen , whey protein , soy protein , vital wheat gluten , peanut protein , pea protein , or mixtures thereof . the emulsifier preferably is chosen from , but is not limited to , mono - glycerides , di - glycerides , propylene glycol monoester , propylene glycol diester , sodium steroyl lactylate , lecithin , polysorbate , sorbitan monostearate , glyceryl lacto ester , or mixtures thereof . the gum preferably is chosen from , but is not limited to , pectin , guar , locust bean , tara , gellan , alginate , tragacanth , karaya , ghatti , agar , gelatin , arabic , acacia , carrageenan , xantham , cellulose , carboxymethylcellulose , hydroxypropylmethocellulose , or mixtures thereof . the starch preferably is chosen from , but is not limited to , natural or modified starches , cornstarch , waxy cornstarch , rice starch , wheat starch , tapioca starch , potato starch , arrowroot starch , maize starch , oat starch , and mixtures thereof . the batter - coloring agents preferably are chosen from , but are not limited to , natural and artificial coloring agents . the batter flavoring agents preferably are chosen from , but are not limited to , natural and artificial flavoring agents . the antimycotic preservatives preferably are chosen from , but are not limited to , sodium benzoate , potassium sorbate , sodium propionate , calcium propionate , or mixtures thereof . in the formulations listed below , the batter was first mixed to a homogeneous state prior to being poured into a waffle iron . the batter may either be an aerated batter or a non - aerated batter , terms understood by those of ordinary skill in the art . the first layer 25 of batter was poured into the waffle iron and partially cooked prior to depositing of the filling material 14 over the first layer 25 . as would be understood by one of ordinary skill in the art , the filling material 14 may be deposited in a single layer , as several layers on top of each other , or as multiple ribbons adjacent to each other . use of multiple deposits is especially useful when combining several types of fillings such as , for example , a fruit based filling and a cream cheese based filling . subsequent to depositing the filling material 14 , the second layer 26 of batter was poured over the filling material 14 and the waffle iron was closed . the waffle iron was closed for 90 seconds and was set at a temperature of 205 ° c . such waffle irons are well known in the art . the ratio of the uncooked batter to the filling material 14 preferably ranges from 2 : 1 to 8 : 1 . optimally , the ratio of the uncooked batter to the filling material 14 is five parts batter to one part of filling material 14 . for a five to one ratio , two and one half parts of batter is poured into a lower portion of a waffle iron , one part of the filling material 14 is deposited on top of the batter , and the last two and one half parts of batter poured over , concealing the filling material 14 . the components of the filling material 14 were mixed in a conventional manner as would be understood by one of ordinary skill in the art . the batter are mixed in a conventional manner . typically water and flour will be mixed first in a production mixing tank . the other components of the batter are added to the tank as desired . the batter should be mixed at a high speed until a homogeneous batter has been obtained . fruit filled waffles 10 were prepared , as described above , using the batter shown in table 3 and the filling shown in table 4 , all weights based on the total weight of the batter or the filling . the components have been used in the ranges shown and suitable products have been formed : [ 0060 ] table 4 filling material percent by weight water 20 - 25 % sweeteners 40 - 45 % fruit flakes 2 - 10 % instant modified starch 2 - 5 % citric acid 0 . 2 - 0 . 5 % fruit flavoring 0 . 2 - 0 . 5 % xanthan gum 0 . 1 - 0 . 5 % emulsifier 0 . 2 - 0 . 5 % powdered malic acid 0 . 1 - 0 . 4 % caramel coloring 0 . 1 - 0 . 4 % ground cinnamon 0 . 1 - 0 . 5 % salt 0 . 1 - 0 . 5 % the resulting filled waffle 10 can be frozen for up to nine months or more and yet retain the fresh - like qualities for the consumer . the packaging necessary for freezer storage includes , but is not limited to sealing the waffle 10 in an airtight wrapper . sealing the filled waffle 10 in an airtight wrapper will prolong the maximum recommended storage period but is not necessary for short - term storage . the filled waffle 10 is intended to be heated in an upright toaster until browned and warmed for consumption . sweet flavor filled waffles 10 were prepared using an alternative filling material 14 wherein the filling is a maple flavored filling presented in table 5 , below . the batter was prepared as described above and the waffles were prepared as described above . cheese filled waffles 10 were prepared using the filling formulation below , the batter described above , and assembled as described above . examples of useful cheeses include , but are not limited to , cream cheese , imitation cheese , cheese powder , american cheese , asagio cheese , baker &# 39 ; s cheese , blue cheese , cheddar cheese , fortina cheese , monterey jack cheese , mozzarella cheese , parmesan cheese , provolone cheese , ricotta cheese , romano cheese , swiss cheese , and mixtures thereof . the dairy cream may include , but is not limited to , whole dairy cream , evaporated dairy cream , powdered dairy cream , dairy analogs , and mixtures thereof . the invention has been described in an illustrative manner , and it is to be understood that the terminology which has been used is intended to be in the nature of words of description rather than of limitation . obviously , many modifications and variations of the present invention are possible in light of the above teachings . it is , therefore , to be understood that within the scope of the appended claims , wherein reference numerals are merely for convenience and are not to be in any way limiting , the invention may be practiced otherwise than as specifically described .
a baked toastable freezer stable filled waffle is disclosed . the filled waffle has a batter - based outer casing material that surrounds an inner filling material . utilization of a filling material having a water content and water activity level below that of the outer casing material enables the formation of a toastable freezer stable filled waffle . the filled waffle can be stored frozen and reheated rapidly in a conventional toaster without burning or charring of the outer casing material and complete heating of the inner filling material .