Stir together the 1 1/2 cups flour, granulated sugar, baking powder and salt. Combine egg, milk and oil. Add to flour mixture; mix well. Stir in raisins. Turn into a greased 9x9x2-inch baking pan. Combine nuts, brown sugar, 1 Tbsp flour, butter or margarine and cinnamon; sprinkle over batter. Bake in a 375° oven about 25 minutes. Makes 1 coffee cake.