Prepare dough the night before and refrigerate.
Cream margarine and sugar. Add eggs and sour cream. Mix all dry ingredients together and add gradually to the wet mixture. Add vanilla.
Then take one-half of the dough, roll out and cut cookies. Place on ungreased cookie sheets. Bake at 350 degrees for 8 to 10 minutes. (Check after 8 minutes.) Repeat with other half of dough. Makes 5 dozen cookies.
Note: "I use airbake cookie sheets which give more even looking, soft and moist cookies. I use whipped white frosting and color whatever I want with food coloring."