For an even crispier coating, double-dredge the shrimp by dipping back into the buttermilk and coating a second time. For a lighter option, cook in an air fryer at 400 degrees F for 8 to 10 minutes, shaking the basket halfway through. Leftover shrimp can be stored in the fridge for up to 2 days and reheated in the air fryer to restore crispiness.