1/2      C butter or margarine - softened
1/2      C shortening
1/2      C packed brown sugar
1/4      C granulated sugar
2 1/4   C all-purpose flour
1         tsp. salt

Heat oven to 300 degreees. Beat butter, shortening and sugars in large bowl
with electric mixer on medium speed, or mix with spoon. Stir in flour
and salt. (Dough will be dry and crumbly; use hands to mix
completely,)

Roll dough into rectangle, 15x71/2 inches on lightly floured surface. Cut into 1 1/2 inch squares. Place about 1 inch apart on ungreased cookie sheet. Bake about 25 minutes or until set. These cookies brown very little and the shape does not change. Remove from cookie sheet to wire rack.