State Fair Sugar Cookies

1 cup White sugar
1 cup Butter
1 Egg
2 cup Flour
1/2 tsp Salt
1 tsp Baking powder
1 tsp Vanilla extract
 
Blend the butter and sugar. Add in the egg and beat well. Add all dry ingredients, blending well. Roll dough into logs and place on wax paper. Chill 2 or 3 hours until firm. Slice dough into 1/2 inch slices, sprinkling with sugar. Bake at 350 degrees F for 10 to 12 minutes.