Line a 15 x 10 x 1 inch baking sheet with foil; cover with single layer of graham crackers. Mix margarine, butter and sugar in a saucepan; bring to a boil and cook for 2 minutes. Pour mixture over crackers; sprinkle nuts on top. Bake in a preheated 350 degree oven for 12 minutes. Cut into triangles while warm. Yield: 4 dozen cookies.