01 - Preheat oven to 350°F. Line a baking sheet with parchment paper or lightly grease it.
02 - In a large bowl, whisk together flour, granulated sugar, baking powder, cinnamon, and salt.
03 - In a separate bowl, whisk together milk, egg, melted butter, and vanilla extract.
04 - Add the wet ingredients to the dry ingredients and mix until just combined.
05 - Fold in the diced apples.
06 - Drop tablespoon-sized mounds of batter onto the prepared baking sheet, spacing them about 2 inches apart.
07 - Bake for 16-18 minutes, until golden brown and a toothpick inserted into a bite comes out clean.
08 - While the bites cool slightly, prepare the frosting: Mix powdered sugar, milk, and vanilla extract in a small bowl until smooth.
09 - Drizzle or spread the frosting over the warm apple bites. Let set for a few minutes before serving.