Blooming Onion

This crispy blooming onion is the ultimate party appetizer, featuring a sweet onion sliced into crunchy golden petals and paired with a creamy, spicy dipping sauce that’s loaded with bold flavor.

Every bite delivers the perfect combination of crispy coating, tender onion, and a little kick of heat that keeps everyone reaching for more.

Perfect for game days, backyard gatherings, or restaurant-style snacking at home, this blooming onion recipe creates an impressive centerpiece that’s surprisingly easy to make.

The seasoned coating fries up beautifully crisp while the tangy dipping sauce adds the finishing touch that makes this appetizer impossible to resist.

Prep Time: 35 minutes
Cook Time: 10 minutes
Total Time: 45 minutes
Servings: 6

Ingredients

For the Dipping Sauce

  • 1/2 cup mayonnaise
  • 2 tablespoons cream-style horseradish sauce
  • 1 tablespoon ketchup
  • 1/3 teaspoon paprika
  • 1/3 teaspoon cayenne pepper
  • 1/4 teaspoon salt
  • 1/8 teaspoon dried oregano
  • 1 pinch ground black pepper

For the Coating

  • 1 cup milk
  • 1 egg
  • 1 cup all-purpose flour
  • 1 1/2 teaspoons salt
  • 1 1/2 teaspoons cayenne pepper
  • 1 teaspoon paprika
  • 1/2 teaspoon ground black pepper
  • 1/3 teaspoon dried oregano
  • 1/8 teaspoon dried thyme
  • 1/8 teaspoon ground cumin

For the Onion

  • 1 large sweet onion
  • 3/4 cup vegetable oil, or enough for frying

Directions

  1. Prepare the dipping sauce by combining mayonnaise, horseradish sauce, ketchup, paprika, cayenne pepper, salt, oregano, and black pepper in a medium bowl. Stir until smooth and well blended. Cover and refrigerate until ready to serve.
  2. In a separate medium bowl, whisk together the milk and egg until fully combined.
  3. In another bowl, mix together flour, salt, cayenne pepper, paprika, black pepper, oregano, thyme, and cumin to create the seasoned coating.
  4. Trim about 1 inch from the top and bottom of the onion and peel away the outer skin. Carefully cut a small core from the center while leaving the root end intact.
  5. Place the onion root-side down and slice downward through the onion several times to create 16 evenly sized petals, making sure not to cut all the way through the bottom.
  6. Gently separate the onion petals with your fingers. For easier separation, briefly place the onion in boiling water for 1 minute, then transfer to cold water.
  7. Dip the onion into the milk mixture, coating all petals thoroughly. Transfer to the seasoned flour mixture and coat well, making sure to sprinkle flour between each petal.
  8. Repeat the dipping process by returning the onion to the milk mixture and then coating again in the flour mixture for an extra crispy finish.
  9. Heat oil in a deep fryer or large heavy pot to 350 degrees F (175 degrees C). Carefully lower the onion into the hot oil with the cut side facing up.
  10. Fry for about 10 minutes, or until the onion is deep golden brown and crispy.
  11. Transfer the blooming onion to a wire rack or paper towels to drain excess oil.
  12. Place the dipping sauce in the center of the onion and serve immediately while hot and crispy.

Chef’s Notes

  • Sweet onions such as Vidalia work best because they become tender and flavorful after frying.
  • Double coating the onion helps create an extra crunchy crust.
  • If the onion starts browning too quickly, slightly reduce the oil temperature.
  • Serve immediately for the crispiest texture and best flavor.
  • You can adjust the cayenne pepper to make the dipping sauce milder or spicier.
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