This Apple Upside-Down Cake is a wonderful dessert cake to showcase fall apples. It is quick to prepare and pretty much foolproof to make — the trick is to have the butter well softened.... You can use any of your favorite apples to make this. If you have a sweet tooth, use Golden Delicious. If you like a little bite to your apples, go for Granny Smiths or Braeburns. For a richer dish, sauté the apple slices in a little butter before arranging them in the pan.
Grease a 9-inch skillet or cake pan with the leftover butter wrapper and liberally smear with the extra tablespoon of butter. Sprinkle with the extra tablespoon of sugar. Arrange the apples neatly in the pan in the shape of a wheel. Set aside while you make the batter.
Put the softened butter, sugar, eggs and vanilla into a large mixing bowl. Sift the flour, salt and baking powder over it. Beat it all together with an electric mixer until well blended. If the mixture is stiff, add milk to bring it to dropping consistency (where a small amount of the batter will fall off a spoon if gently shaken).
Spoon the batter gently over the apples with a spatula and smooth it lightly to cover them. Bake on a middle shelf for about 30 minutes or until a toothpick comes out clean.
Let the cake sit for 5 minutes. Run a knife round the edges to loosen it, then set a plate over the top and turn the whole thing upside down. Tap all over the bottom of the skillet and lift it off the cake. You will have a cake with sticky, caramelized apple topping sitting on the plate. Sprinkle with toasted almonds. Eat warm. Serve with cream, ice cream or Greek yogurt.
To bring out more autumn flavors, try drizzling 2 tablespoons maple syrup over the apples instead of sugar.