How to Make Condensed Milk
To make condensed milk, start by pouring 1 cup of boiling water into a blender. Next, add in 1/4 cup of margarine and 2 cups of sugar and blend the ingredients until they're smooth. Then, add 1 cup of dry milk powder to the blender and blend it until it's creamy. Repeat this step until you've added 4 cups total of milk powder into the blender. Finally, pour the condensed milk from the blender into an airtight container and keep it refrigerated until you're ready to use it.
Get a blender and pour the water into it.  Add the stick of margarine and the 2 cups of sugar to the blender.  Turn the blender on and combine the ingredients well.  Take one cup of the dry milk powder and slowly add it to the blender. Combine and blend. Repeat for the three other cups, so that you're blending after you add each time. Store in airtight container and place in refrigerator.  Finished.  Pour the water into a 2-cup glass measuring cup or jug. Add the milk slowly, stirring to combine it properly. Stir until smooth. Place in the microwave. Microwave on high, uncovered, for 1/2 to 1 minute. Or, heat until the milk is steaming hot. Remove from the microwave. Stir in the sugar (or Splenda). Keep stirring until the sugar has dissolved. Allow to cool before using.  Heat the milk in a heavy-based saucepan. Do not let it burn. Add sugar and baking soda to the hot milk in the pan. Stir in well. Keep stirring until the milk thickens. Stir at least once a minute, if not more often. When the milk thickens, keep stirring. This will help it to thicken even more. Once the consistency is very thick, the condensed milk is ready. Remove it from the heat. Let the condensed milk stand aside for an hour to cool. Then transfer to an airtight container for refrigeration or use immediately. 
Get a blender and pour the water into it. Add the stick of margarine and the 2 cups of sugar to the blender. Turn the blender on and combine the ingredients well. Take one cup of the dry milk powder and slowly add it to the blender. Store in airtight container and place in refrigerator. Finished. Pour the water into a 2-cup glass measuring cup or jug. Place in the microwave. Remove from the microwave. Allow to cool before using. Heat the milk in a heavy-based saucepan. Add sugar and baking soda to the hot milk in the pan. Keep stirring until the milk thickens. When the milk thickens, keep stirring. Once the consistency is very thick, the condensed milk is ready. Let the condensed milk stand aside for an hour to cool. 