In a large mixing bowl, whisk together the flour, sugar, baking powder, salt, and cinnamon.

In a separate bowl, whisk the milk, egg, vanilla extract, and melted butter.

Gradually add the wet ingredients to the dry mixture, mixing until just combined.

Fold in the diced apples.

Heat about 2 inches of oil in a frying pan or deep fryer to 350°F (175°C).

Carefully drop tablespoon-sized portions of the batter into the hot oil, frying a few at a time.

Fry for about 1-2 minutes per side or until golden brown, then transfer to a paper towel-lined plate to drain excess oil.

In a small bowl, whisk together powdered sugar, milk, and vanilla until smooth.

Once the fritters are slightly cooled, dip or drizzle them with the glaze.

Let the glaze set for a few minutes on a wire rack.