Preheat the air fryer: Set to 400°F (200°C) for 5 minutes.
A hot basket helps the coating crisp right away.
Pat the crabs dry: Use paper towels to remove excess moisture. Dry shells = better browning and crunch.
Whisk the dredge: In a shallow bowl, mix flour, cornstarch, Old Bay, garlic powder, paprika, salt, and pepper.
Optional egg wash: In a separate bowl, beat the egg with buttermilk. This helps the coating cling, but you can skip it for an ultra-light crust.
Coat the crabs: If using egg wash, dip each crab, let excess drip, then dredge in the flour mix.
If not using, press the crabs directly into the seasoned flour. Shake off extra.
Prep the basket: Lightly spray the air fryer basket with oil to prevent sticking.
Arrange and spray: Place crabs top-side up in a single layer. Lightly mist the tops with oil.
Don’t crowd; cook in batches if needed.
Air fry: Cook at 400°F (200°C) for 6–8 minutes. Flip, spray again, and cook 3–5 minutes more. You’re looking for deep golden edges and a crisp shell.
Total time is usually 9–13 minutes, depending on size and your air fryer model.
Season and rest: Sprinkle with a pinch of salt while hot. Let rest 1 minute so the crust sets.
Serve: Plate with lemon wedges and your favorite sauce. A simple green salad or buttered corn makes an easy side.