This Air Fryer Blooming Onion Recipe makes a crunchy, irresistible appetizer without the mess and extra oil of deep-frying. Crispy on the outside and tender inside, it’s perfect for game day, gatherings, or a flavorful snack.
Air Fryer Blooming Onion Recipe
My family loves a blooming onion, but traditional deep-frying adds a lot of unnecessary fat. This air-fryer version uses a seasoned flour and a horseradish dipping sauce for big flavor while keeping things lighter. The method is straightforward—slice the onion into petals, coat it in a seasoned batter, and air fry until golden and crisp.
Below are clear, step-by-step instructions and a complete recipe card. Read through the tips and variations to customize the flavor and ensure a perfectly crisp result.
Ingredients You’ll Need:
- Large sweet onion (Vidalia works well)
- All-purpose flour for the breading
- Paprika and cayenne pepper for mild heat and color
- Ground cumin, dried thyme, and oregano for depth
- Eggs, milk, and water to make the batter adhere
- Cooking oil spray (olive or vegetable) to promote browning in the air fryer
Sauce
- Mayonnaise to bind the sauce
- Sour cream for tang
- Ketchup for sweetness and color
- Prepared horseradish for a signature bite
- Paprika, salt, garlic powder, dried oregano, plus black or cayenne pepper to taste
How to Cook an Air-Fried Blooming Onion:
Step 1: Combine the sauce ingredients—mayonnaise, sour cream, ketchup, horseradish, paprika, garlic powder, oregano, salt, and pepper—in a bowl. Cover and chill while you prepare the onion so the flavors meld.
Step 2: Trim about 1/2 inch from the top of the onion and peel off the outer skin. Place the onion cut-side down on a cutting board so the root end is up; this helps hold the petals together while you cut.
Step 3: Starting about 1/2 inch from the root, cut downward to the board to form the first wedge. Repeat three more times to create four even sections.
Step 4: Between each of the four cuts, make three additional cuts to end up with 16 petals. If you find this difficult, a blooming onion cutter is an option.
Step 5: Turn the onion over and let it rest for about 5 minutes so the petals relax and spread slightly, which makes it easier to coat.
Step 6: Use your fingers to gently separate the petals before breading so the flour and batter reach between them.
Step 7: Whisk the flour with paprika, cayenne, cumin, thyme, and oregano in a large bowl.
Step 8: In a separate bowl whisk eggs, milk, and water. Place the onion cut-side up in a clean bowl, pour the seasoned flour over it, and use a large spoon to work the flour between the petals. Turn the onion over and tap off excess flour, reserving the flour bowl for later.
Step 9: Dip the floured onion into the egg mixture, let excess drip off, then return it to the reserved flour and lightly coat again. Avoid an overly thick coating—too much batter can make the interior doughy and increase cook time. Chill the coated onion in the refrigerator while you preheat the air fryer to 350°F for 10 minutes.
Step 10: Remove the onion from the refrigerator and spray it generously with cooking oil. Make an aluminum foil sling to lift the onion easily, place the onion cut-side up in the air fryer basket, and set the timer for 25 minutes. Spray the onion 2–3 times during cooking so it browns evenly.
When golden and crisp, remove the onion with the foil sling, season with salt and pepper, and serve with the chilled horseradish dipping sauce. Enjoy!
What is an Air Fryer?
An air fryer is a compact convection oven that circulates hot air to crisp food quickly. It produces a texture similar to frying but with far less oil and less lingering cooking smell.
Benefits of Using an Air Fryer
Air fryers are convenient, fast, and energy-efficient. They deliver a satisfying crunch without deep-frying, and they keep your kitchen free of heavy fryer odors.
Storage and Reheating
Store leftover blooming onion in the refrigerator for up to 3–4 days; it will lose crispness over time, so eat sooner when possible. Reheat in the air fryer or oven at 350°F until warmed and crisp. The horseradish sauce keeps for 4–5 days in the fridge.
Variations
- Cut the onion into sticks instead of a bloom for bite-sized fries—bread and cook the same way.
- Change the seasoning to create a Cajun or spicy version by adding Cajun seasoning or extra crushed red pepper.
Recipe Card
Air Fryer Blooming Onion Recipe
20
25
Ingredients
Blooming onion
- 1 large sweet onion
- 2 ½ cups all-purpose flour
- 1 tablespoon paprika
- 1 teaspoon cayenne pepper
- ½ teaspoon ground cumin
- ½ teaspoon dried thyme
- ½ teaspoon dried oregano
- 2 large eggs
- 1 cup milk
- Salt and pepper to taste
- Oil for spraying
Sauce
- ¼ cup mayonnaise
- ¼ cup sour cream
- 2 teaspoons ketchup
- 1 tablespoon horseradish
- ¼ teaspoon paprika
- ¼ teaspoon salt
- ⅛ teaspoon garlic powder
- ⅛ teaspoon dried oregano
- Black pepper and cayenne to taste
Instructions
Blooming onion sauce
- Combine all sauce ingredients in a bowl, cover, and refrigerate.
Blooming onion
- Trim 1/2 inch from the top of the onion and peel the outer skin. Place cut-side down and make four evenly spaced vertical cuts starting 1/2 inch from the root.
- Turn the onion over, let it rest 5 minutes, and gently separate the petals with your fingers.
- Make three additional cuts between each of the four sections to create 16 petals total.
- Whisk the flour with paprika, cayenne, cumin, thyme, and oregano. In a separate bowl, whisk eggs, milk, and water.
- Place the onion cut-side up in a clean bowl, pour the seasoned flour over it, and spoon the flour between the petals. Turn the onion over and tap off excess flour; reserve the flour bowl.
- Dip the onion into the egg mixture, let excess drip off, then return it to the reserved flour for a light second coating.
- Chill the coated onion in the refrigerator while preheating the air fryer to 350°F for 10 minutes.
- Remove the onion, spray generously with cooking oil, place it on an aluminum foil sling in the air fryer basket, and cook for 25 minutes. Spray 2–3 times during cooking to encourage even browning.
- Carefully lift out the onion, season with salt and pepper, and serve with the chilled horseradish sauce.
- Enjoy!
