For best results, use room temperature ingredients to ensure proper incorporation of air into the batter. The timing of the flip is critical - too soon and the caramel will be too runny, too late and it may stick to the pan. Fresh pineapple can be substituted but should be patted dry thoroughly to prevent excess moisture. For a healthier version, you can reduce sugar in the cake batter by 1/4 cup and add cinnamon to enhance sweetness.