SOFT Sugar Cookies

This is the recipe I've been searching for for years!  These are SO SOFT and good and PERFECT! 

SOFT SUGAR COOKIES

1 cup sour cream
1 cup butter
2 cups sugar
3 eggs
6 cups flour, approximately
1 tsp. baking soda
1 tsp. baking powder
2 tsp. vanilla
1/2 tsp. salt

Cream butter and sugar.  Add eggs, vanilla, and sour cream.  Add dry ingredients, mix thoroughly (it will be sticky, don't add too much flour).  Chill in the fridge 2-3 hours.  Roll dough out, cut into shapes. (I left my dough pretty thick, at least 1/2 inch, when I rolled it out.  And try to work and roll the dough as LITTLE as possible after you chill it.)  Bake at 350 for 10-12 minutes. (Watch them, and don't let them over cook, and they will be perfect.) Cool and frost with icing.