What is an ‘onion boil’?
Onion boil is a term that covers a category of recipes that involve hollowing out a whole onion, stuffing it with butter and seasonings, and then cooking it in the oven, grill or air fryer until sweet, tender and dripping with buttery goodness. Most versions wrap the onion in foil before cooking to help the onion steam and lock in flavor. However, air-fryer onion boil recipes typically leave the onion unwrapped to allow the edges to get slightly crisp.
As for seasonings, Old Bay is a popular choice (and, likely, why the recipe is known as a “boil”). However, you can doctor up your onion with any seasonings you enjoy. Steak seasoning, homemade taco seasoning, lemon pepper or curry powder would all taste great and give you leeway to enjoy this humble onion dish with just about any cuisine.
Ingredients
1 large sweet onion, peeled
3 tablespoons unsalted butter, softened
2 teaspoons Old Bay seasoning
