First, start by peeling very ripe bananas.
Add the bananas to the stand mixer and mix until they are mashed.
Add the egg to the bananas while mixing.
Pour in the oil, vanilla extract and milk. Mix just until combined.
In a separate bowl, combine the flour, baking powder, salt, cinnamon, nutmeg and sugar. Whisk together to combine.
Mix once again while adding the flour mixture to the banana mixture about 1/4 cup at a time so you don’t end up in a cloud of flour dust.
Stop to scrape the sides of the bowl as needed.
Preheat the air fryer to 325 degrees F for 5 minutes. Spray cupcake liners with cooking spray and place them inside the muffin pan. You can use individual ones like these or a standard one like this. Use a spoon so scoop the batter and place it into each cupcake liner. The liners should be about 3/4 of the way full. Place the banana bread muffins inside of the air fryer and air fry for 12-15 minutes at 325 degrees F. Check on the muffins after the 12 minute mark and insert a toothpick to check for doneness. If it comes out clean, they’re ready. Finally, remove the banana muffins from the air fryer and let them cool down before removing them from the muffin pan. Serve with a cold glass of milk and enjoy!