In fact, most things that encompass wet batter won’t cook in an air fryer as there isn’t a component in air fryers that’s able to set the wet batter. Instead, it would all just pool into the base of the vessel, leaving a disheartening, sloppy mess. Even if you know how to clean an air fryer well this would be an unwelcome task, one to avoid – plus you'd have no dinner.
Plus, particularly with Yorkshire puddings, you need a decent amount of oil (problematic in itself as that would also just go everywhere) that needs to be sizzling hot before you can pour your batter in, otherwise, the puddings will be greasy and flaccid rather than light and puffy.
On another practical note, it’s unusual for air fryers, particularly smaller ones, to feature a glass door or window, so you can see what’s happening inside without opening it. This means that even if you heated the oil in a ramekin in order to contain it, you wouldn’t be able to check to see if the batter is rising or not, defying the golden rule of achieving perfect Yorkies – don’t disturb them until they’re cooked! Furthermore, air fryers cook quickly, so even just 60 seconds could spell the difference between triumph and disaster.
Fresh fish fillets, chicken, prawns, and even veg dipped in wet batter won’t work in an air fryer either, explains Richard Gurdin, air fryer buyer and expert at Robert Dyas, "wet batter goes everywhere, and without a proper oil bath, the batter won’t set, which means you won’t get the crispy, fried item you’d hoped for".
So if it’s fish and chips that you fancy for tea, it’s best to stick to the frozen kind, which will cook to crispy perfection in an air fryer.