Combine 1 1/4 cups of flour, 1/2 cup firmly packed brown sugar and 1/4 teaspoon salt. Cut in 1/2 cup butter until particals are fine. Place mixture into a 11x7 inch pan. Bake at 400 degrees for 10-12 minutes,stirring occasionally until golden brown.Remove about 1/2 cup mixture for topping. Press remainder of the mixture into bottom of pan. Cool completely.