In a wide bowl, combine the flour, baking powder, superfine sugar, ground cinnamon and salt. In a small bowl, lightly beat the milk and egg. Slowly mix the milk/egg mixture into the dry ingredients until the batter is thin enough to dip the apples in but thick enough to stick. Add more flour or milk as needed to reach the right consistency. Let batter set for 15 minutes.

Meanwhile, heat the oil in a deep skillet or deep-fryer to 350 degrees F.

Line a baking sheet with paper towels. Working with a couple slices at a time, dip the apple rings into the batter to coat, then add to the hot oil. Fry for 3-4 minutes, until puffy and golden brown, flipping halfway. Transfer to the prepared baking sheet to drain and allow to slightly cool.

Sprinkle the fried apple rings generously with cinnamon sugar then a dusting of powdered sugar. Serve immediately.

Source: Adapted from Almost Bourdain