Cherry Crumb Dessert
["1/2 c. butter or margarine, chilled", "1 (18 1/2 oz.) pkg. yellow cake mix", "1 (21 oz.) can cherry or blueberry pie filling", "1/2 c. chopped walnuts", "whipped cream or ice cream (optional)"]
["In a mixing bowl, cut butter into cake mix as for pastry dough.", "Set aside 1 cup.", "Pat remaining crumbs onto the bottom and 1/2 inch up the sides of a greased 13 x 9 x 2-inch baking pan. Spread pie filling over crust.", "Combine the walnuts with reserved crumbs; sprinkle over top.", "Bake at 350\u00b0 for 30 to 35 minutes. Serve warm with whipped cream or ice cream if desired.", "Yields 12 to 16 servings."]
["butter", "yellow cake", "cherry", "walnuts", "whipped cream"]