This is a caramelized apple mixture that is prepared then baked in the pancake, and then baked in the oven in a 9-inch cake pan, then puffs up like a souffle. You can even pre-cook the apple mixture to use later, just store it in the fridge, although I have never tried this, I do think that you could likely make the apple mixture, then freeze it in small containers, to have handy when you make this pancake but I have only refrigerated the apple mixture... It is the perfect brunch, I have even served this for dinner too, this is one of my DH's favorites pancakes, he can eat a whole one all by himself LOL! I usually make two (prepare in two separate bowls) and use two cake pans. This is the most fantastic pancake you will ever try! MacIntosh apples are really the best for this.