I always thought you couldn't put a wet batter in an air fryer, but a cooking blog post from 'The Kitchn' proved me wrong. | Air Fryer Recipes - Discusd
Actually, I've put wet batter in my waffle maker before and it worked fine. You just have to be careful not to overfill it. The key is using a thick batter so it doesn't run out the sides before it starts to cook.
Does the air fryer actually cook the inside before the outside turns into a total mess? I've tried wetter batters in a standard deep fryer and the coating usually just slides off unless it's frozen first. Wouldn't an air fryer's strong fan just blow the loose batter around before it sets up?