1 c. butter
2 c. sugar
2 eggs
2 tsp. vanilla or lemon extract
1 c. sour cream
1 tsp. salt
2 tsp. baking soda
6 1/2 c. flour, divided

FROSTING:

2 2/3 c. powdered sugar
1/2 tsp. cream of tartar
2 egg whites, unbeaten
1/2 tsp. vanilla

Mix all ingredients except 1 cup flour. Save for rolling out dough. Refrigerate for 2 hours. Roll out in small quantities and cut with cookie cutters. Bake at 375 degrees for 8 to 10 minutes. Mix frosting ingredients together and whip until frosting stands in peaks. Frost cookies.