Holiday Sugar Cookies to Cut and Paint

This recipe appeared in magazine advertisements for C&H Sugar about 30 years ago. It makes a good dough that can be rolled and cut into shape cookies. I know that the list of ingredients is directly from the C&H recipe. I'm not sure about the directions. I think I may have rewritten them.

Holiday Sugar Cookies to Cut and Paint

1/2 cup soft margarine
1 cup C&H sugar
1 large egg
1 tbsp. lemon juice
1 tsp. vanilla
2 cups flour
1/2 tsp. salt
1/2 tsp. baking soda
Food coloring (optional)

Cream margarine and sugar until fluffy. Beat in egg, lemon juice, and vanilla. Combine dry ingredients; gradually beat into margarine mixture until well blended. Divide dough into three parts. Add food color if desired. Flatten each part to about 1 inch thick between two sheets of food wrap. Place in freezer until thoroughly chilled. Heat oven to 375°. Roll chilled dough to about 1/8 inch thick. Cut cookies; place on ungreased cookie sheet. Brush with Egg Yolk Paint if desired.  Bake 8 to 10 minutes or until edges are lightly browned. (About 4 dozen medium cookies.)

Egg Yolk Paint

1 egg yolk
1 teaspoon water.
Food coloring (optional)

Mix egg yolk with water. Divide into several cups and add food color as desired. Thin as necessary with water while using. Paint BEFORE baking.