Staple food comes in different forms.
A staple food , or simply a staple , is a food that is eaten routinely and in such quantities that it constitutes a dominant portion of a standard diet for a given people , supplying a large fraction of energy needs and generally forming a significant proportion of the intake of other nutrients as well . Main staple foods are derived either from vegetals and animal products , including cereals ( such as rice , wheat , maize , millet , or sorghum ) , starchy tubers or root vegetables ( such as potatoes , cassava , yams , or taro ) , meat , fish , eggs , milk , and cheese .