Upside-down desserts are culinary genius. When fruit cooks on the bottom of the pan instead of on the top, it steams and often caramelizes, giving it a deep, concentrated sweetness and melding its ...

1. Preheat oven to 425 degrees. Melt 3 tablespoons butter in a 10-inch cast-iron skillet. Stir in brown sugar. When melted, spread evenly across the bottom of the skillet. Arrange apple slices in ...