Directions

1. Preheat oven to 425 degrees.
2. Combine eggs, milk, and vanilla in the jar of a blender. Blend until well combined. Add flour, granulated sugar, salt, cinnamon, and nutmeg. Blend until dry ingredients are well incorporated; set aside.
3. Place butter in a 9-by-13-inch glass baking dish. Transfer dish to oven and heat until butter has just melted. Carefully remove from oven and place apples in a single layer in baking dish. Return to oven and cook until butter begins to bubble, about 4 minutes.
4. Pour batter over apples, sprinkle with brown sugar, and continue baking until puffed and golden, about 20 minutes. Sprinkle with confectioners' sugar, if desired; serve immediately.