Peel and core the apples. Dice the apples and toss them in a bowl with the lemon juice.
Prepare the cinnamon sugar mixture in a shallow bowl and set it aside.
In a large mixing bowl, whisk together the flour, sugar, baking powder, cinnamon and salt.
In a separate bowl, combine the eggs, milk and vanilla. Fold the wet ingredients into the dry ingredients. Then, fold in the apples.
Heat at least 1 inch of oil in a heavy bottomed pan or Dutch oven. There should be enough oil for the fritters to float. Monitor the temperature with a kitchen thermometer until it reaches 350F degrees.
Drop 1/4 cup of batter into the hot oil, flattening slightly with a slotted spoon. Fry until golden on both sides, flipping as needed.
Remove fritters with a slotted spoon and toss in the cinnamon sugar mixture. Place on a wire cooling rack.
To make the glaze, whisk the powdered sugar, milk and vanilla. Drizzle over cooled fritters.