Place the frog legs into a large bowl, add the milk or the buttermilk to the bowl. Then add the Old Bay Seasoning and Garlic Powder. Cover and place into the refrigerator for about an hour.
In another bowl, mix the cornmeal, flour, and another 1 teaspoon of Old Bay Seasoning. Mix well.
As you remove the frog legs from the milk/buttermilk marinate, let the milk drip off, and then place the frog legs into the cornmeal batter, repeat with the milk marinade and again in the cornmeal mixture.
As you double coat them, place them into a greased air fryer basket, sprayed with cooking spray. Set the temperature to 400 degrees F, air fryer setting for 5 minutes, flip and air fry for another 3-5 minutes. Until fully cooked.
If you really want them to crisp up, I would suggest spraying them generously with cooking spray.
Plate, serve, and enjoy!