Preheat oven to 375.Combine brown sugar and cinnamon.Whisk together eggs and milk.Mix together flour and baking powder and stir it into the egg/milk mixture.In a skillet, heat butter, add the apple slices and 1 tablespoon of the brown sugar mixture and cook, stirring, until soft. About 5 minutes.Pour the batter over the apples and sprinkle the remaining brown sugar on top.Bake until it puffs up, about 18-20 minutes.Dust with a little powdered sugar.