Butterscotch Freeze 'n Slice Cookies

1 cup sugar
1 cup firmly packed brown sugar
1 1/2 cups butter or margarine -- softened
3 eggs
4 1/2 cups all-purpose flour
2 teaspoons baking powder
1 teaspoon baking soda
1 teaspoon cinnamon
1/2 teaspoon salt
Line two 8x4-inch loaf pans with foil, allowing foil to extend above sides of pans. In large bowl, combine sugar, brown sugar and butter. Beat until light and fluffy. add eggs. Blend well. Add flour, baking powder, baking soda, cinnamon and salt. Mix well. Press half of dough into each foil-lined pan. Fold foil over dough to seal. Freeze 2-3 hours or until well chilled.
Heat oven to 350 degrees. Lightly grease cookie sheets. Unfold foil. Lift dough out of pans. Remove foil. Cut dough into 1/4-inch slices. Place slices 2-inch apart on greased cookie sheets. Bake for 8-12 minutes or until light golden brown. Cool 1 minute. Remove from cookie sheets. NOTES: Pans can be omitted. Shape dough into two 8x4x2-inch rectangles. Wrap tightly in foil. freeze. Bake as directed.