Our Favorite Sugar Cookies

We are all agreed over here that these are our favorite sugar cookies.  

1 1/2 c. softened butter
3 c. white sugar
4 eggs
2 tsp. vanilla
5 c. flour
2 tsp baking powder
1 tsp. salt

Cream together butter and sugar.  Add eggs and vanilla.  Mix in flour, baking powder and salt.  Refrigerate at least an hour before you want to roll them out, or overnight.  Roll out to 1/2 inch thick.  Cut into shapes and bake for 6-8 minutes at 350 degrees. Don't over cook!  These are the best.