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Golden fried Texas Roadhouse onion blossom fully bloomed with spicy dip in the center
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Foolproof Texas Roadhouse Onion Blossom

A crispy, double-dredged copycat of the Texas Roadhouse onion blossom, tested for a full even bloom and a coating that stays crisp instead of falling apart in the oil.
Prep Time25 minutes
Cook Time6 minutes
Total Time1 hour 5 minutes
Course: Dessert
Cuisine: American
Servings: 12 servings
Calories: 385kcal

Ingredients

For the Onion Blossom:

  • 1 large sweet Vidalia onion (4–5 inches wide)
  • 2 cup buttermilk
  • 1 tablespoon hot sauce
  • 2 cup all-purpose flour
  • 1/2 cup cornstarch
  • 1 tablespoon paprika
  • 1 teaspoon cayenne pepper
  • 2 teaspoon garlic powder
  • 2 teaspoon onion powder
  • 1 teaspoon dried oregano
  • 11/2 teaspoon kosher salt
  • 1/2 teaspoon black pepper
  • Neutral oil (vegetable or canola), for frying

For the Dipping Sauce:

  • 1/2 cup mayonnaise
  • 2 tablespoon ketchup
  • 1 tablespoon prepared horseradish
  • 1/4 teaspoon cayenne pepper
  • 1/4 teaspoon paprika
  • Pinch of kosher salt

Instructions

  • Slice ½ inch off the top of the onion and peel away the skin, leaving the root end intact. Set root-side down and cut 12 to 16 evenly spaced wedges from top to root, stopping ½ inch above the root on each cut.
  • Whisk the buttermilk and hot sauce together in a bowl large enough to submerge the onion. Set the onion in cut-side down, then turn root-side down and gently press the petals open. Soak for at least 30 minutes.
  • Whisk together the flour, cornstarch, paprika, cayenne, garlic powder, onion powder, oregano, salt, and pepper in a large bowl.
  • Lift the onion from the buttermilk and dredge in the flour mixture, working the flour between every petal. Dip back into the buttermilk for 10 seconds, then dredge in the flour a second time.
  • Place the dredged onion on a wire rack and refrigerate, uncovered, for 20 minutes.
  • While the onion chills, whisk together the mayonnaise, ketchup, horseradish, cayenne, paprika, and salt for the dipping sauce. Refrigerate until serving.
  • Heat at least 3 inches of oil to 350°F in a large pot. Lower the onion in petal-side down, then flip root-side down after 1 minute. Fry for 4 to 6 minutes, until deep golden brown all over.
  • Lift the onion out and drain root-side down on a wire rack for 2 minutes. Gently pull the outer petals open wider by hand, then serve immediately with the dipping sauce spooned into the center.

Notes

  • Leave exactly ½ inch of root intact when cutting — more and the petals won't separate, less and they'll detach in the oil.
  • The dipping sauce improves after 15–20 minutes in the fridge as the flavors settle; make it while the onion soaks.
  • For gluten-free, use a 1:1 GF flour blend and a gluten-free hot sauce; check for doneness a minute earlier since the coating browns faster.
  • To freeze, double-dredge the onion, freeze whole on a tray until solid, then wrap tightly for up to 1 month. Fry from frozen, adding 2–3 extra minutes.
  • Reheat leftovers in a 375°F oven or air fryer for 4–8 minutes to restore crispness; avoid the microwave, which turns the coating rubbery.