Outback Steakhouse Blooming Onion Copycat

This Outback Steakhouse Blooming Onion Copycat is the ultimate appetiser for a shared meal at home. After testing this recipe five times, I finally got it just right to capture that signature crisp shell and tender, sweet onion interior. Let’s get straight to recreating this iconic dish in your own kitchen.

Recipe Overview

Prep Time: 30 minutes
Cook Time: 8-10 minutes
Total Time: 40 minutes
Servings: 4-6 as a starter
Difficulty: Medium

Why You’ll Love This Outback Steakhouse Blooming Onion Copycat

Golden, crispy petals with a tender, sweet onion centre that pulls apart effortlessly.
A seasoned flour coating that delivers that familiar, savoury crunch without being greasy.
Perfectly shareable for gatherings, game days, or a fun family dinner starter.
Uses simple pantry ingredients to create a restaurant-style experience at home, much like you can with our Cracker Barrel Apple Butter Copycat Recipe.com/five-guys-burger-cajun-fries-copycat/”>Five Guys Burger & Cajun Fries Copycat.
That spicy, creamy dipping sauce brings everything together with a tangy finish.

Outback Steakhouse Blooming Onion Copycat

15 min prep · 30 min cook · 4 servings

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Ingredients You’ll Need

1 large sweet onion (such as Vidalia or Spanish), about 300g
150g plain flour
2 teaspoons paprika
1 teaspoon cayenne pepper
1 teaspoon garlic powder
1 teaspoon onion powder
1 teaspoon dried oregano
1 teaspoon salt
½ teaspoon black pepper
250ml whole milk
1 large egg
Vegetable or sunflower oil, for deep frying
For the Dipping Sauce:
120ml mayonnaise
2 tablespoons tomato ketchup
2 tablespoons creamed horseradish
1 teaspoon white vinegar
½ teaspoon smoked paprika
¼ teaspoon cayenne pepper

Tip: A sweet onion is essential here. It provides a mildness that balances the spicy coating, whereas a standard brown onion can turn sharp and overpowering when fried.

How to Make Outback Steakhouse Blooming Onion Copycat

Prepare the onion: Peel the onion and slice off the top stem end, leaving the root end intact. Place the onion root-side down. Make downward cuts from the top towards the root, stopping about 1.5cm from the root. Repeat to create 16-20 evenly spaced petals. Gently separate the petals with your fingers—you should see the layers start to fan out like a flower.
Make the batter: In a medium bowl, whisk together the flour, paprika, cayenne, garlic powder, onion powder, oregano, salt, and pepper. In a separate shallow bowl, whisk the milk and egg until smooth and pale yellow. The mixture should look uniform with no streaks of egg white.
Dredge the onion: Place the prepared onion in the seasoned flour, spooning the mixture between all the petals. Shake off any excess flour until the onion looks dusty but not clumpy. Then, dip the floured onion into the milk and egg mixture, ensuring every petal is coated. Let the excess batter drip off for a few seconds. Finally, return the onion to the flour mixture and coat again, pressing gently so the flour adheres. You should see a thick, speckled crust forming on each petal.
Heat the oil: Pour oil into a deep, heavy-bottomed pot to a depth of at least 7.5cm. Heat the oil to 180°C (350°F). If you don’t have a thermometer, drop a small piece of batter into the oil—it should sizzle vigorously and float to the surface within seconds. The oil should shimmer but not smoke.
Fry the onion: Carefully lower the onion into the hot oil, root-side down, using a spider skimmer or tongs. Fry for 3-4 minutes, then carefully flip the onion over using two forks. Continue frying for another 3-4 minutes. The petals should be deep golden brown and crisp, and you’ll hear a satisfying crackle as the onion cooks. The aroma of fried onion and spices will fill your kitchen.
Drain and season: Remove the onion from the oil and place it on a wire rack set over a baking tray. Sprinkle immediately with a pinch of salt while the crust is still hot. Let it rest for 2 minutes—the steam escaping will keep the centre tender while the outside stays crunchy.
Make the dipping sauce: While the onion rests, stir together the mayonnaise, ketchup, horseradish, vinegar, smoked paprika, and cayenne in a small bowl. The sauce should be a pale coral colour with a creamy, smooth texture. Taste and adjust the seasoning with a little more horseradish if you want extra kick.

Tips From My Kitchen

Chill the onion before frying: After you’ve cut and separated the petals, pop the onion in the fridge for 15 minutes. This firms up the layers, making them easier to coat without breaking apart. The cold onion also helps the batter cling better when it hits the hot oil.
Don’t skip the double dredge: The first flour coating acts as a base, the wet batter adds moisture, and the second flour coating creates a thick, craggy crust. This two-step process is what gives the blooming onion its signature crunch—a single dredge will result in a thin, pale coating that doesn’t hold up well.
Use a thermometer for the oil: Maintaining a steady 180°C is critical. If the oil is too cool, the onion absorbs excess oil and becomes greasy. If it’s too hot, the outside burns before the inside cooks through. A thermometer removes all the guesswork and ensures a perfect result every time.
Fry one onion at a time: Crowding the pot drops the oil temperature drastically, leading to a soggy outcome. Frying a single blooming onion gives it enough space to cook evenly and allows the oil to stay at the right temperature throughout the process.
Let the onion rest on a wire rack: Placing the fried onion directly on paper towels traps steam against the crust, softening it. A wire rack allows air to circulate around the whole onion, keeping every petal crisp until you’re ready to serve. My husband, who’s usually picky, asked for seconds after I made this switch!

Equipment You’ll Need

Deep, heavy-bottomed pot or Dutch oven
Spider skimmer or slotted spoon
Two forks for flipping
Wire rack and baking tray
Sharp chef’s knife
Two shallow bowls for dredging
Kitchen thermometer

Common Mistakes to Avoid

Cutting too close to the root: If you slice all the way through the root, the petals will fall apart during frying. Leave a solid 1.5cm at the base so the onion holds its flower shape. A gentle touch when separating the petals also helps keep the structure intact.
Skipping the resting time after coating: After the final flour dredge, let the onion sit for 5 minutes before frying. This resting period allows the flour to hydrate slightly and adhere firmly to the onion. If you fry immediately, the coating can slide off in the hot oil.
Using too much cayenne in the batter: The original Outback version has a mild warmth, not overwhelming heat. Stick to the measured amount of cayenne in the recipe, and adjust the dipping sauce if you want more spice. Overloading the flour mix can make the onion unpalatably hot.

Delicious Variations to Try

Spicy Version: Add an extra teaspoon of cayenne pepper to the flour mixture and stir a tablespoon of hot sauce into the milk and egg batter. For the dipping sauce, mix in a teaspoon of chilli flakes or a dash of your favourite hot sauce for an extra fiery kick.
Vegetarian/Vegan Option: Replace the whole milk with unsweetened oat or soya milk and use a flax egg (1 tablespoon ground flaxseed mixed with 3 tablespoons water). Ensure your batter is well-seasoned, as plant-based milks can be a little thinner. The result is just as crispy and satisfying.
Different Protein: Use the same seasoned flour and batter to coat cauliflower florets or thick slices of halloumi cheese. For a chicken version, cut boneless, skinless chicken thighs into strips, coat them in the same batter, and deep fry until golden and cooked through. This approach works beautifully for a sharing platter.

What to Serve With Outback Steakhouse Blooming Onion Copycat

A fresh green salad with a tangy vinaigrette to cut through the richness.
Grilled steaks or burgers for a full American-style feast.
Crunchy Chick Fil A Coleslaw Copycat Recipe for a cool, creamy side.
Sweet potato fries or potato wedges for extra indulgence.
A light, crisp lager or a sparkling water with lemon to refresh the palate.

Frequently Asked Questions

Can I bake this blooming onion instead of frying?

Yes, you can bake it, though the texture will be different. Place the coated onion on a wire rack over a baking tray and spray generously with cooking oil. Bake at 220°C (425°F) for 20-25 minutes, flipping halfway through, until golden and crisp. It won’t be as crunchy as the deep-fried version, but it’s a lighter alternative that still tastes lovely.

How do I store and reheat leftovers?

Leftover blooming onion is best eaten fresh, but you can store it in an airtight container in the fridge for up to a day. To reheat, place the onion on a baking tray in a preheated oven at 200°C (400°F) for 5-7 minutes. Avoid the microwave, as it will make the coating soggy and chewy.

Can I use a different type of onion?

Sweet onions like Vidalia or Spanish are best because they are mild and become tender and sweet when fried. Red onions can work, but they have a stronger flavour, and standard brown onions may turn bitter. Stick with a large sweet onion for the most authentic result.

Why did my onion petals stick together during frying?

This usually happens if the petals weren’t separated enough before coating, or if the batter was too thick. After cutting the onion, gently fan out the petals with your fingers to ensure each one is separate. Also, shake off excess batter before the final flour coat to prevent clumping.

Can I prepare the onion ahead of time?

You can cut and separate the petals up to 24 hours in advance, storing the onion in a bowl of cold water in the fridge. When you’re ready to cook, drain and pat it very dry before coating. Do not batter the onion ahead of time, as the coating will become gummy and won’t fry properly.