01 -
Combine buttermilk or milk with lemon juice in a small bowl and let rest for 5 minutes to thicken.
02 -
Peel onions, trim tops and bottoms to create a flat base, then make vertical cuts to form petal shapes without cutting through the base.
03 -
In a separate bowl, whisk together flour, paprika, garlic powder, onion powder, cayenne, salt, and pepper until evenly combined.
04 -
Dip each onion into the buttermilk mixture, allowing excess to drip off, then thoroughly coat with the seasoned flour mixture.
05 -
Preheat the air fryer to 190°C (380°F) for 5 minutes.
06 -
Place coated onions upright in the air fryer basket, ensuring enough space for air circulation.
07 -
Lightly spray the top and edges of the onions with cooking spray or brush with oil to promote crispiness.
08 -
Air fry the onions for 10 to 12 minutes, shaking the basket halfway through to ensure even cooking.
09 -
Mix mayonnaise, ketchup, horseradish sauce, lemon juice, and seasonings to taste; serve alongside warm onions.