Sugar Cookies

1 C. margarine, softened to room temp (has to be REAL stick margarine, not spread or they will not turn out)
1 1/2 C sugar
3 eggs
1 TBSP vanilla
3 C flour
2 tsp. baking powder
1/2 tsp. salt

Cream margarine and sugar, add eggs and vanilla. Add dry ingredients, mix well. Chill at least one hour. Roll out on floured surface to 1/8-1/4 in thick, and cut with cookie cutters dipped in flour. Bake at 350 for 10-12 minutes. Frost and decorate if desired. If you just want to decorate with colored sprinkles, put them on before baking. Frosting: 1 lb. powdered sugar (about 4 C), 4 TBSP melted margarine, 1 egg white, 1 tsp vanilla. Mix and add small amounts of milk until desired thickness.