Sugar Cookies

3 c flour
1 egg
3/4 c butter
1 tea baking soda
1c sugar
1/4 c sour cream
1.2 tea salt
3 tea vanilla

cream butter, sugar, and egg. add salt, and soda. sift in flour, add sour cream. chill in fridge for 24 hours for best results or till cool to touch. Roll out, cut and place on cookie sheet. bake at 350 for 9-11 min. let cool and frost.