This recipe makes 8 packages of white frosting

2 cups Confectioners sugar (sifted)
3 tbsp instant nonfat milk powder
6 tbsp vegetable shortening

In a medium size bowl, combine sugar and milk powder, stirring well. Cut shortening into mix. Divide into 8 ziploc sandwich bags (about 1/3 cup in each). Store in cupboard up to three months.

To use frosting:
Combine one package with 3/4 tsp water in a small bowl, mixing well. Frost on easy bake oven cake.