Yummy Sour Cream Sugar Cookies

1 cup margarine
1 cup shortening
3 eggs
3 tsp. vanilla
1 cup sour cream
6 1/2 cups flour
2 tsp. soda
1 tsp. salt

Bake @ 400 F for 6-8 minutes. This makes a lot of cookies, so if you are just making them for your family, I would half the recipe.