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Crispy Air Fryer Blooming Onion Recipe with Spicy Horseradish Sauce

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A quick and easy recipe for a crispy blooming onion made in the air fryer, served with a tangy and spicy horseradish dipping sauce. Perfect as a flavorful appetizer or snack without the mess of deep frying.

Ingredients

Scale
  • 1 large yellow onion (about 6 inches in diameter)
  • 1 cup all-purpose flour
  • 1 teaspoon paprika
  • 1 teaspoon garlic powder
  • 1/4 teaspoon cayenne pepper
  • 1/2 teaspoon salt
  • 1/4 teaspoon black pepper
  • 1 cup buttermilk (or milk with a splash of lemon juice)
  • 1 large egg
  • 1 cup panko breadcrumbs
  • Cooking spray
  • For the spicy horseradish sauce:
  • 1/2 cup sour cream
  • 2 tablespoons prepared horseradish
  • 1 teaspoon Dijon mustard
  • 1 teaspoon lemon juice
  • 1/2 teaspoon Worcestershire sauce
  • Salt and pepper to taste

Instructions

  1. Prepare the onion (10 minutes): Peel the onion, leaving the root end intact. Place it cut side down on a cutting board. Carefully slice downward into the onion about 1/2 inch from the root, making 12-16 cuts to create petals. Gently separate the petals without breaking them.
  2. Make the wet batter (5 minutes): In a bowl, whisk together the buttermilk and egg until smooth.
  3. Mix the dry coating (5 minutes): In another bowl, combine the flour, paprika, garlic powder, cayenne pepper, salt, and black pepper.
  4. Coat the onion (10 minutes): Dip the onion into the wet batter, making sure every petal is thoroughly covered. Then dredge into the flour mixture, shaking off excess. For extra crispiness, repeat the wet and dry coating once more. Be gentle to keep the petals intact.
  5. Preheat the air fryer (5 minutes): Set your air fryer to 350°F (175°C) and let it heat up.
  6. Air fry the onion (15-20 minutes): Place the coated onion root-side down in the basket. Spray generously with cooking spray. Cook for 15 minutes, then carefully flip using tongs and spray again. Cook for an additional 5 minutes or until golden and crispy.
  7. Make the spicy horseradish sauce (5 minutes): While the onion cooks, whisk together sour cream, horseradish, Dijon mustard, lemon juice, Worcestershire sauce, salt, and pepper until smooth. Taste and adjust heat or tanginess as desired.
  8. Serve immediately: Transfer the blooming onion to a plate and serve alongside the horseradish sauce for dipping. Enjoy hot and crunchy.

Notes

Keep the root intact to hold petals together. Double coat the onion petals for extra crispiness. Avoid overcrowding the air fryer basket to ensure even crisping; cook in batches if needed. The spicy horseradish sauce tastes better after resting a few hours in the fridge. Reheat leftovers in the air fryer at 350°F for 3-4 minutes to restore crispiness. Baking in a convection oven at 375°F for 25-30 minutes is an alternative but may yield less crispiness.

Nutrition

Keywords: blooming onion, air fryer, appetizer, crispy onion, horseradish sauce, spicy dip, snack, easy recipe

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