Beat 1 egg; add 1 cup sugar gradually, beating constantly. Add 1/3 cup melted butter or salad oil; mix well. Sift together 1/2 cup flour, 1/4 teaspoon salt and 1/4 teaspoon baking powder. Add to first mixture. Add 1 cup chopped walnut meats, 1/2 cup chopped raisins and 1 teaspoon maple flavoring. Spread in greased 8x8x2 pan. Bake in moderate oven 350 degrees for 30 minutes. Cool slightly. Using a sharp knife, cut in bars. Very good.