1. Prepare the Batter:

1. In a large mixing bowl, whisk together the flour, sugar, baking powder, salt, and cinnamon.
2. In a separate bowl, whisk the milk, eggs, and vanilla extract until combined.
3. Gradually add the wet ingredients to the dry ingredients, stirring gently until just combined (do not overmix).
4. Fold in the diced apples, ensuring they are evenly distributed.

2. Heat the Oil:

1. In a deep skillet or large pot, heat 2–3 inches of vegetable oil over medium heat.
2. Use a thermometer to ensure the oil reaches 350°F (175°C) for even frying.

3. Fry the Fritters:

1. Using a large spoon or ice cream scoop, carefully drop heaping tablespoons of batter into the hot oil. (Avoid overcrowding the pan.)
2. Fry each fritter for 2–3 minutes per side, flipping gently with a slotted spoon or tongs, until golden brown and cooked through.
3. Remove the fritters and place them on a plate lined with paper towels to drain excess oil.

4. Make the Vanilla Glaze:

1. In a small bowl, whisk together the powdered sugar, milk, and vanilla extract until smooth.
2. Adjust the consistency by adding more milk (for a thinner glaze) or more powdered sugar (for a thicker glaze).

5. Glaze the Fritters:

1. While the fritters are still slightly warm, drizzle the vanilla glaze over the top or dip each fritter into the glaze for full coverage.
2. Let the glaze set for a few minutes before serving.