Prepare a baking sheet with parchment paper, foil, or wax paper.
Spray the air fryer basket with cooking spray.
You'll need 3 shallow bowls to coat the apple slices. Place flour in one bowl and egg whites in another. Mix graham cracker crumbs, sugar, and cinnamon in the last bowl, mixing well to combine.
Cut each apple into 8 slices. Cut away the core or use an apple corer before making your slices.
Dip sliced apples in the flour, then the egg whites, letting any excess drip off. Then dip slices in the cinnamon mixture. Be sure to coat all sides of the slices.
Set apples on the prepared baking sheet while you work in batches to coat each slice.
Place apples slices (skin side down) in a single layer in the air fryer basket.
Air fry at 380 degrees F for 6 to 7 minutes. Cooking time may vary depending on the size of your slices.
Serve with warmed caramel sauce, chocolate sauce, peanut butter, maple syrup, a drizzle of honey, or as is.
Notes
You may need to adjust amount of egg whites depending on the size of your apple slices.It's important to choose the best apples possible. Be sure they are free from bruises, indentations, and are firm.Don't cut thin slices for this recipe. Thicker slices work best. Top warm apple slices with a scoop of vanilla ice cream for some cozy apple pie vibes!