Basic Icebox Sugar Cookies

1 C all purpose flour
1/4 tsp baking soda
1/4 tsp salt
1/4 C butter, softened
2/3 C sugar
1 tsp vanilla
1 large egg white
cooking spray

Lightly spoon flour into a dry measuring cup level with a knife. Combine flour, baking soda and salt in a bowl and set aside. Beat butter with a mixer at medium speed until light and fluffy. Gradually add sugar, beating until well blended. Add vanilla and egg white, beat well. Add flour mixture, stir until well blended. Turn dough out onto wax paper, shape into a 6 inch log. Wrap log in wax paper; freeze 3 hours or until very firm. Preheat oven to 350 degrees. Cut log into 24 (1/4 inch) slices; place slices 1 inch apart on a baking sheet coated with cooking spray. Bake at 350 for 8-10 minutes. Removed from pan. Cool in wire racks.