Bloomin' Onion Petals

Featured in Elegant Small Bites.

These crispy Bloomin' Onion Petals are a homemade version of the famous restaurant appetizer, featuring seasoned batter-fried sweet onion with a tangy horseradish dipping sauce.
Recipes Fives Halima
Updated on Mon, 21 Apr 2025 16:30:45 GMT
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Bloomin' Onion Petals deliver all the crispy, golden deliciousness of the famous Outback appetizer in perfectly poppable individual pieces. These lightly battered sweet onion wedges maintain the ideal balance between crunchy coating and tender onion interior, making them impossible to resist. Paired with the spot-on copycat dipping sauce featuring that signature tangy-spicy flavor profile, these onion petals bring restaurant-quality indulgence right to your kitchen.

I first experimented with these petals after growing frustrated with traditional whole bloomin' onions that always seemed to leave half the pieces undercooked or impossible to separate. After watching my typically vegetable-averse teenager devour almost an entire batch alone, I knew I'd found a winning approach. My neighbor who worked at Outback for years actually claimed these taste even better than the restaurant version – higher praise I cannot imagine. What surprised me most was discovering how much more flavor the individual petals develop compared to the whole onion version – each piece gets perfectly crisp while maintaining that sweet onion tenderness inside.

Essential Elements

  • Sweet onions: Form the foundation with their natural sweetness and tender texture. Vidalia, Walla Walla, or Texas Sweet varieties provide ideal flavor balance.
  • Buttermilk: Creates perfect adhesion for breading while adding subtle tanginess. The acidity helps tenderize the onion slightly during marination.
  • Seasoned flour mixture: Provides flavor-packed coating that crisps beautifully. The blend of spices ensures every bite delivers perfect seasoning.
  • Mayonnaise base sauce: Forms creamy foundation that carries complementary flavors. Full-fat version provides richest texture and flavor.
  • Prepared horseradish: Delivers essential kick that defines the signature sauce. Fresh varieties offer most vibrant flavor though jarred works beautifully too.
  • High smoke-point oil: Creates perfect frying environment for golden exterior. Peanut, canola or vegetable oil varieties maintain consistent temperature throughout cooking.

Preparation Method

Create crave-worthy sauce:
Combine mayonnaise with sour cream establishing creamy base. Add ketchup, horseradish, and spices developing perfect flavor balance. Allow flavors to meld in refrigerator while preparing onions. This crucial resting time develops depth throughout sauce.
Prepare perfect petals:
Cut onion into precise segments creating ideal size for dipping and eating. This careful preparation ensures consistent cooking throughout each piece while maximizing surface area for crispy coating.
Develop flavor foundation:
Mix flour with comprehensive seasoning blend creating well-balanced coating. This thoughtfully spiced mixture ensures each petal delivers full flavor profile rather than bland crispiness.
Create proper breading:
Toss onion sections in initial flour coating creating dry surface for batter adhesion. Dip in buttermilk mixture allowing excess to drain properly. Coat thoroughly in seasoned flour ensuring complete coverage without clumping.
Fry with precision:
Maintain oil at exact temperature preventing both greasiness and undercooked interiors. Work in small batches avoiding temperature drops from overcrowding. Monitor carefully for perfect golden color indicating ideal doneness.
Maintain maximum crispness:
Transfer finished petals to paper towel briefly absorbing excess oil. Move promptly to wire rack preventing condensation that would soften coating. This two-step process ensures optimal texture from first piece to last.
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My first attempt at these petals taught me valuable lessons about oil management. I crowded too many pieces into the oil at once, causing the temperature to plummet and resulting in soggy, oil-absorbed petals rather than crisp ones. Now I work in small batches, maintaining consistent oil temperature throughout. I've also discovered that making the sauce a day ahead creates remarkably better flavor as the ingredients have time to fully blend. The most surprising discovery was how well these freeze after the initial flour coating but before frying – I now prepare large batches through the first flour step, freeze them individually, then finish the breading and frying process whenever cravings strike.

Serving Suggestions

Present in paper-lined basket creating casual restaurant experience. Offer dipping sauce in small ramekin alongside petals rather than underneath. Consider providing additional dipping options like ranch or honey mustard complementing different flavor preferences.

Flavor Variations

Add cayenne to both batter and sauce creating spicier version for heat enthusiasts. Incorporate ranch seasoning into flour mixture creating different flavor profile throughout coating. Consider adding finely grated parmesan to breading creating savory cheese notes throughout exterior.

Storage Solutions

Keep leftovers uncovered in refrigerator maintaining crispness better than sealed containers. Reheat in 375°F oven restoring original crunch effectively. Avoid microwave reheating which creates soggy rather than crispy texture.

The first time I served these at a gathering, three different people asked for the recipe before the night ended. There's something about perfectly fried onions with that signature dipping sauce that creates instant happiness. What makes these petals truly special isn't complicated technique but attention to detail in the preparation – using sweet onions, maintaining proper oil temperature, and creating that perfect breading-to-onion ratio transforms a simple vegetable into something crave-worthy. I've discovered they're perfect for those occasions when you want to create something impressive without spending hours in the kitchen – they consistently earn enthusiastic reactions while requiring just everyday ingredients and basic cooking skills.

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Easy Bloomin’ Onion Petals | recipesfives.com

Crispy Copycat Restaurant Appetizer

Crispy, golden-fried onion petals with a seasoned coating and creamy, zesty dipping sauce - just like your favorite steakhouse appetizer!

Prep Time
15 Minutes
Cook Time
4 Minutes
Total Time
19 Minutes
By: Halima

Category: Savory Snacks

Difficulty: Intermediate

Cuisine: American

Yield: 4 Servings (4 servings)

Dietary: Vegetarian

Ingredients

→ For the sauce

01 ½ cup mayonnaise
02 ¼ cup sour cream
03 2 tablespoons ketchup
04 2 tablespoons prepared horseradish
05 1 clove garlic, minced
06 ½ teaspoon kosher salt
07 ¼ teaspoon black pepper
08 ¼ teaspoon smoked paprika
09 Pinch of cayenne pepper

→ For the petals

10 1 large sweet onion
11 2 cups all-purpose flour
12 2 teaspoons seasoned salt
13 ½ teaspoon pepper
14 ½ teaspoon garlic powder
15 ½ teaspoon cayenne pepper
16 ½ teaspoon onion powder
17 ½ teaspoon smoked paprika
18 1 cup buttermilk
19 1 large egg
20 Oil for frying

Instructions

Step 01

In a bowl, whisk together the mayonnaise, sour cream, ketchup, horseradish, garlic, salt, pepper, paprika, and cayenne until smooth. Cover with plastic wrap and place in the refrigerator until you are ready to serve.

Step 02

Cut the root end off of the onion and peel. Cut the onion in half, then into quarters. Cut the quarters in half, set aside.

Step 03

In a large bowl, add the flour, seasoned salt, pepper, garlic powder, cayenne pepper, onion powder, and smoked paprika, stir until combined. In another medium-sized bowl, add the buttermilk and egg and whisk together.

Step 04

Separate out the onion petals and place them in a gallon-sized ziptop bag. To the bag, add 1⁄4 cup of the flour mixture. Seal and toss the onions in the flour until coated as best you can.

Step 05

Take a handful of the onion petals at a time, gently shaking off the excess flour. Dip them into the buttermilk mixture, let any excess liquid drip off. Next, add the onion petals directly to the bowl with the flour mixture and coat them well, again shaking off any excess flour. Place the onion petals onto a parchment-lined sheet tray while continuing to coat the rest of the remaining onion petals.

Step 06

Heat your deep fryer or a large skillet that has deep sides with about 2-inches of oil to 350°F. Once hot, fry the onion petals for 3-4 minutes until golden brown, you will most likely need to do this in batches to not overcrowd the pan.

Step 07

Place the fried onion petals onto a plate lined with paper towels to absorb any excess oil. Then, place them on a wire rack over a sheet tray (to catch any excess oil) while you fry the remaining petals, so they don't become soggy. Once all of the onion petals are done frying, remove the sauce from the refrigerator, serve and enjoy!

Notes

  1. Make sure whatever you're frying the onions in has high walls on it to help keep the oil splatter down.
  2. Use fresh onions when possible, they'll have the best flavor.
  3. The longer these onion pieces sit, the more soggy they'll become. So enjoy them as soon as possible.
  4. Use a sweet onion variety if you have them, other onion varieties can be used in a pinch.
  5. Make the sauce a day ahead of time if you can, it's even more flavorful then!
  6. These petals aren't spicy. If you like spice, try adding more cayenne to your breading and to the homemade sauce mixture.

Tools You'll Need

  • Deep fryer or large skillet with deep sides
  • Parchment paper
  • Baking sheet
  • Wire rack
  • Mixing bowls
  • Gallon-sized ziplock bag
  • Paper towels
  • Thermometer (for checking oil temperature)

Allergy Information

Please check ingredients for potential allergens and consult a health professional if in doubt.
  • Contains eggs (in mayonnaise and egg wash)
  • Contains dairy (sour cream, buttermilk)
  • Contains gluten (flour)

Nutrition Facts (Per Serving)

It is important to consider this information as approximate and not to use it as definitive health advice.
  • Calories: 543
  • Total Fat: 28 g
  • Total Carbohydrate: 62 g
  • Protein: 11 g