In a large mixing bowl, combine the cooked macaroni, shredded cheddar cheese, grated Parmesan, milk, and egg. Stir thoroughly until well blended, creating a creamy mixture.

Sprinkle in garlic powder, onion powder, salt, and pepper, mixing until evenly distributed.

With clean hands, take small portions of the mixture and roll them into golf ball-sized bites.

Roll each bite in breadcrumbs, coating them evenly.

Preheat your air fryer to 375°F (190°C) for 3-5 minutes.

Carefully place the coated Mac and Cheese Bites in a single layer in the air fryer basket.

Cook for 8-10 minutes, or until golden brown and crispy.

Once cooked, remove the bites and let them cool slightly on a wire rack before serving.