Puffed Apple-Orange Oven Pancake Recipe

1. Preheat the oven to 450°F. Combine the milk, flour, eggs, sugar, vanilla, and orange zest in a food processor fitted with the metal blade, a blender, or a bowl and process or whisk until smooth. Add the apple pieces and stir to combine.
2. Place the butter in a 10-inch pie pan or ovenproof skillet and put it in the oven to melt. Brush the inside of the pan to coat it evenly with the butter.
3. Pour the batter into the prepared pan and bake for 15 minutes. Reduce the heat to 350°F and bake for 15 minutes longer, or until the pancake is nicely browned, cooked in the center, and well puffed. Remove from the oven and sprinkle the powdered sugar generously on top. Serve immediately.