I've been using this recipe for years. Everyone loves these cookies.
4 cups flour
1 cup sugar
2 tbsp. baking powder
1/4 tsp. baking soda
1/4 tsp. salt
2 sticks of high fat margarine
1/2 cup sour ceam
3 large eggs
1 tsp. flavoring (your choice)
Mix dry ingredients; BY HAND: beat eggs, add...