6 tbsp. melted butter
1 can pineapple rings
Whipped topping
3/4 c. brown sugar
1 yellow cake mix

Line 9"x13" pan with tin foil so that it extends up the side of the pan. Spread melted butter and sprinkle brown sugar evenly in the bottom of the pan. Arrange pineapple. Prepare yellow cake mix per package directions. Pour on top. Bake at 350 degrees for 45 minutes. Turn out on warm plate. Peel off tin foil. Serve warm or cold with whipped topping.