Edible Craft Dough Cookies - cooking recipe

Ingredients

1 c. butter or margarine, softened
1 c. shortening
2 1/2 c. powdered sugar
6 hard-cooked egg yolks, mashed
2 tsp. baking soda
2 tsp. cream of tartar
1 Tbsp. vanilla extract
5 c. all-purpose flour

Preparation

Cream butter and shortening; gradually add sugar.
Add egg yolks, soda, cream of tartar and vanilla, beating well. Gradually add flour, mixing well.
Divide dough into 4 equal portions.
Color one red, one yellow, one green and leave one plain.
Wrap each separately in plastic wrap; chill at least one hour.