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Easy Air Fryer Blooming Onion Recipe

Capture the magic of a restaurant-style blooming onion in your own kitchen with this easy air fryer recipe. It's crispy, flavorful, surprisingly simple to make with less mess and oil, and perfect for sharing as a crowd-pleasing appetizer or snack.
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Prep Time 15 minutes
Cook Time 25 minutes
Total Time 55 minutes
Servings: 4 servings
Course: Appetizer, Side Dish, Snack
Cuisine: American
Ingredients Equipment Method Notes

Ingredients
  

  • 1 large sweet onion like a Vidalia or Walla Walla, cut off top, peeled
  • 2.5 cups all-purpose flour for coating
  • 1 tbsp paprika
  • 1 tsp cayenne pepper adjust to spice preference
  • 0.5 tsp ground cumin
  • 0.5 tsp dried thyme
  • 0.5 tsp dried oregano
  • 2 large eggs
  • 1 cup milk
  • 1 cup water
  • salt and pepper to taste
  • Oil in a spray bottle like avocado or olive oil, for air frying

Equipment

  • Air fryer
  • Large Bowls
  • Sharp knife
  • Cutting Board

Method
 

  1. Step 1: Prepare the onion. Slice off about ½ an inch from the top (stem end) of the onion. Peel off the papery skin. Place the onion cut-side down. Make cuts from about ½ inch away from the root straight down to the cutting board, creating 16 evenly spaced cuts that radiate from the center but remain attached at the root.
  2. Step 2: Let the onion relax. Carefully turn the onion over so the cut side is facing up. Let it sit for about 5 minutes to help the layers open up. Gently separate outer petals if needed.
  3. Step 3: Set up coating station. In the first large bowl, whisk together the flour, paprika, cayenne pepper, cumin, dried thyme, dried oregano, and salt and pepper. In the second large bowl, whisk together eggs, milk, and water.
  4. Step 4: First flour coat. Place the onion, cut-side up, in a clean bowl or use the dry mix bowl. Pour the flour mixture over the onion, using a spoon to get it into the petals. Gently flip the onion over and pat off excess flour. Reserve remaining flour mixture.
  5. Step 5: Wet dip and final flour coat. Carefully lift the onion and dip it into the egg mixture, ensuring it gets all over and between the petals. Let excess drip off. Transfer the wet onion back into the bowl with the reserved flour mixture. Coat thoroughly again, using a spoon to help, and tapping off excess flour.
  6. Step 6: Chill & preheat. Place the coated onion on a plate or container and refrigerate for at least 15-30 minutes. Preheat your air fryer to 350°F (175°C) while it chills.
  7. Step 7: Into the air fryer. Remove the chilled onion. Generously spray it all over with oil spray. Use an aluminum foil sling to carefully lower the onion into the air fryer basket, cut-side up. Gently pull the foil out.
  8. Step 8: Air fry. Air fry for about 25 minutes. Open the basket around the 10 and 20-minute marks and spray the onion generously with oil again, especially on any dry spots. Cook until golden brown and crispy.
  9. Step 9: Serve. Carefully lift the onion out. Place on a serving plate, season immediately with extra salt and pepper if desired. Serve right away with your favorite blooming onion dip (like ranch, spicy mayo, or remoulade).

Notes

Best served immediately for ultimate crispness. Leftovers can be stored in an airtight container in the refrigerator for 1-2 days. To reheat and restore crispness, place onion back in the air fryer at 350°F (175°C) for 5-8 minutes, or until heated through and crispy. Avoid microwaving leftovers as it will make them soggy. You can prepare and coat the onion a few hours ahead of time and keep it chilled in the refrigerator before air frying for maximum crispness upon cooking.