Chocolate-Kahlua Brownies
["1 1/2 c. sugar", "1/2 c. egg substitute", "1/4 c. margarine", "3 Tbsp. Kahlua", "1 1/4 c. sifted flour", "1/2 c. unsweetened baking cocoa", "1 tsp. baking powder", "1/2 cup finely chopped walnuts (optional)"]
["Combine first four ingredients, stir well.", "Combine flour, cocoa and baking powder; stir into sugar mixture.", "Fold in walnuts. Spoon into a 9-inch square baking dish coated with cooking spray. Bake at 325\u00b0 for 30 minutes or until clean toothpick in center. Let cool on wire rack."]
["sugar", "egg substitute", "margarine", "Kahlua", "flour", "cocoa", "baking powder", "walnuts"]