Air Fryer Cinnamon Toast Crunch Donuts

Place 1 cup of the crushed cinnamon toast crunch and the buttermilk in a large mixing bowl. Give a slight stir and set aside. Combine the flour, cinnamon, baking soda, and baking powder in a medium mixing bowl and mix.
Lightly whisk the egg before adding it to the bowl with the cereal and buttermilk in it. Add the oil, maple syrup, vanilla, greek yogurt, brown sugar, and melted butter to the bowl as well. Stir until thoroughly mixed. Add the flour mixture to the buttermilk mixture, a bit at a time, and stir it in until thoroughly combined.
Spray your donut pan with cooking spray or brush it with melted butter. Fill each cavity about ¾ of the way full. I use a piping bag, but you can use whatever means you prefer.
Place the donut pan into the air fryer basket and cook for 10-12 minutes or until the tops of the donuts are bouncy. Remove the donuts when fully cooked, and let them cool for 20-25 minutes or until fully cooled.
While the donuts are cooling, mix together all the ingredients for the glaze, except the cereal, and stir until thoroughly combined. Gently remove the donuts from the pan and dip the tops in the prepared glaze before placing them on a piece of parchment paper, a pan, a plate, etc.
Crush some of the remaining cinnamon toast crunches, leaving some pieces still whole. Place a couple of whole pieces of cereal on each donut, diagonal, in the corner of the donut before sprinkling in the same direction as the crushed cereal.