2 1/2 cups quick-cooking or regular oats
3/4 cup all-purpose flour
3/4 cup packed brown sugar
1/2 teaspoon baking soda
3/4 cup margarine or butter -- melted
Brownies -- (see recipe)
Heat oven to 350º. Grease baking pan, 13 × 9 × 2 inches. Mix oats, flour, brown sugar and baking soda; stir in margarine. Reserve 3/4 cup of the oatmeal mixture. Press remaining oatmeal mixture in pan. Bake 10 minutes; cool 5 minutes.
Prepare Brownies as directed—except omit nuts. Spread dough over baked layer. Sprinkle with reserved oatmeal mixture.
Bake until brownies begin to pull away from sides of pan, about 35 minutes. (Do not overbake.) Cool; cut into about 1 1/2-inch squares.