Outback Steakhouse Bloomin’ Onion Copycat Recipe

This Outback Steakhouse Bloomin’ Onion copycat brings the famous restaurant appetizer home, and it holds up. One large sweet onion, a seasoned flour coating, and a cold beer batter give you those crispy, pull-apart petals without a trip to the restaurant.

It takes about 30 minutes of hands-on work and feeds a crowd. The dipping sauce comes together in under 5 minutes and is the thing people will keep asking about.

Why I Love This Recipe

The batter has enough seasoning that every petal is salty and a little smoky on its own, not bland filler you dip out of obligation.

The cold batter hitting hot oil is what gets you those craggly, crunchy edges. Room-temperature batter goes soggy faster, so the fridge step earns its place.

This is the version I keep coming back to when people are coming over and I want something that looks impressive but does not wreck my evening.

Recipe Ingredients

• 1 large sweet onion (Vidalia, about 1 lb) – Vidalia or another sweet variety keeps the raw bite mild; a sharp yellow onion works but is more pungent
• 1 1/2 cups all-purpose flour – Divided between the dry dredge and the batter
• 2 tsp paprika – Adds color and mild smokiness; smoked paprika is a good swap
• 1 tsp garlic powder – Background savory depth in both the coating and the sauce
• 1 tsp onion powder – Reinforces the onion flavor without adding moisture
• 1 tsp cayenne pepper – Controls the heat; reduce to 1/2 tsp if you want it mild
• 1 tsp salt – For the flour dredge; taste and adjust based on your brand
• 1/2 tsp black pepper – Ground, for the dredge
• 1/2 tsp dried oregano – Rounds out the spice mix
• 1 cup beer (lager or light beer) – Cold; the carbonation keeps the batter airy and crisp
• 1 large egg – Binds the batter
• Vegetable oil for frying – Enough to fill your pot 3 to 4 inches deep; canola or peanut oil also works

For the dipping sauce:

• 1/2 cup mayonnaise – Full-fat gives the creamiest texture
• 2 tbsp sour cream – Adds a slight tang that cuts through the richness
• 1 tbsp prepared horseradish – The sharp backbone of the sauce; do not skip it
• 1 tsp ketchup – A small amount adds sweetness and color
• 1/4 tsp paprika – For the sauce
• 1/4 tsp garlic powder – For the sauce
• 1/4 tsp salt – For the sauce
• Pinch of cayenne pepper – For the sauce

Variations / Substitutions

• Gluten-free flour – A 1-to-1 gluten-free flour blend works in the dredge and batter; the crust is slightly more delicate.
• Non-alcoholic batter – Swap the 1 cup beer for 1 cup cold sparkling water; the crunch is nearly identical because the carbonation is doing the work.
• Extra heat – Increase the cayenne to 1 1/2 tsp in the dredge and add a few dashes of hot sauce to the dipping sauce.
• Smoked paprika – Using smoked paprika instead of regular throughout gives the whole thing a deeper, almost barbecue-adjacent flavor.
• Lighter sauce – Replace the mayonnaise with Greek yogurt; it is tangier and thinner but still works as a dip.

If you enjoy this kind of fried appetizer, Outback Steakhouse Coconut Shrimp Copycat Recipe is worth trying next.

How To Make Bloomin’ Onion

Step 1: Cut the Onion into Petals

Start by cutting 1/2 inch off the top of the onion, then peel away the papery skin. Place it cut-side down. Using a sharp knife, make 4 evenly spaced cuts from just outside the center root down through the onion, stopping about 1/2 inch before the base so it stays intact. Rotate and make 3 more cuts between each section, giving you 16 cuts total.

Flip the onion cut-side up and use your fingers to gently spread the petals apart. The center petals are tight, so work slowly. If a few petals break at the base, it is not a problem; they will still fry up fine.

Step 2: Dredge the Onion in Seasoned Flour

In a small bowl, stir together 3/4 cup of the all-purpose flour, the 2 tsp paprika, 1 tsp garlic powder, 1 tsp onion powder, 1 tsp cayenne, 1 tsp salt, 1/2 tsp black pepper, and 1/2 tsp dried oregano. Place the onion cut-side up on a plate or sheet pan. Spoon the seasoned flour over it, making sure to get it down between the petals. Shake off any obvious excess, then flip it cut-side down and dust the outside too.

The flour should look like a thin, even haze over every surface. If any petal looks bare and glossy, press more flour into it with your fingers before moving on.

Step 3: Whisk the Batter and Coat the Onion

In a medium bowl, whisk together the remaining 3/4 cup all-purpose flour, the 1 large egg, and the 1 cup cold beer until the batter is smooth with no dry lumps. It should be about as thick as pancake batter. Place the flour-coated onion cut-side down in the batter and spoon batter up over it, working it between the petals with a spoon or your fingers. Flip it, let the excess drip off for a few seconds, then transfer it to a wire rack or plate and refrigerate for 15 minutes.

The cold rest firms up the batter so it clings during frying instead of sliding off. Do not skip this; it is the difference between a coating that stays on and one that pools at the bottom of your oil.

Step 4: Mix the Dipping Sauce

While the onion chills, stir together the 1/2 cup mayonnaise, 2 tbsp sour cream, 1 tbsp prepared horseradish, 1 tsp ketchup, 1/4 tsp paprika, 1/4 tsp garlic powder, 1/4 tsp salt, and the pinch of cayenne in a small bowl until smooth. Taste and adjust the horseradish or cayenne to your liking. Cover and refrigerate until ready to serve.

Step 5: Fry the Onion

Pour vegetable oil into a large, deep pot to a depth of 3 to 4 inches. Heat it over medium-high heat to 375°F (190°C). Using a large spider or slotted spoon, lower the battered onion into the oil cut-side down. Fry for 5 minutes, then carefully flip it cut-side up and fry for another 3 to 4 minutes, until the batter is deep golden brown and the petals feel set and crisp when you nudge them.

The oil temperature will drop slightly when you add the onion. Keep the heat at medium-high and let it recover to around 350°F (175°C) during cooking. If the oil runs too cool, the batter absorbs it and turns greasy.

Step 6: Plate and Serve the Bloomin’ Onion

Lift the onion out with a large spider or two slotted spoons, let it drain over the pot for a few seconds, then set it cut-side up on a paper-towel-lined plate. After 1 minute, transfer it to a serving plate. Spoon the dipping sauce into a small ramekin and set it right in the center of the onion where the core was removed.

Recipe Tips

• Choose the right size onion. You want one that weighs at least 1 lb. Smaller onions do not bloom as dramatically, and the petals stay too tight to coat well.
• Keep your oil temperature steady. Use a thermometer. Guessing leads to either greasy or burnt petals, and the gap between the two is narrow.
• Cut confidently, stop at the base. The most common mistake is cutting too far down and severing the root end, which causes the onion to fall apart in the oil. Leave that 1/2 inch.
• Dry the onion before dredging. Pat the cut onion with a paper towel before adding any flour. Surface moisture makes the seasoned coating clump rather than coat evenly.

Cook times by oil temperature and onion size:

Onion Size	Oil Temp	Cut-Side Down	Flipped
1 lb	375°F (190°C)	5 mins	3 to 4 mins
1.25 lbs	375°F (190°C)	6 mins	4 to 5 mins
1.5 lbs	375°F (190°C)	7 mins	5 to 6 mins

How To Store

• Refrigerate – Place leftovers in an airtight container for up to 2 days. The coating softens overnight, but it is still edible.
• Reheating – An air fryer at 375°F (190°C) for 4 to 5 minutes brings most of the crunch back. A conventional oven at 400°F (200°C) on a wire rack for 8 to 10 minutes also works. Avoid the microwave; it steams the coating.

What To Serve With Bloomin’ Onion

A Bloomin’ Onion works best as a shareable starter before something substantial. It pairs well with a thick grilled ribeye or sirloin because the richness of the fried batter and the dipping sauce contrast nicely against the clean char of the meat. A cold, crisp coleslaw on the side balances the heaviness without competing for attention. If you want to keep the whole meal casual, serve it alongside burgers straight off the grill, where the pull-apart petals make it easy for people to grab while they wait.

Frequently Asked Questions

Can I make the dipping sauce a day ahead?

Yes. It actually tastes better after a night in the fridge because the horseradish and spices have time to settle together. Store it covered for up to 3 days.

Can I use an air fryer instead of deep frying?

The results are noticeably different. An air fryer will cook the onion, but it cannot replicate the full, even golden crust you get from submersion in hot oil; the batter tends to dry out rather than crispen on the outer petals.

My petals kept falling off in the oil. What went wrong?

Almost always the root end was cut too deep. The base needs that 1/2 inch of intact onion to hold everything together. A second common cause is batter that was too thin; the batter should coat a spoon without running off immediately.

Can I cut and batter the onion earlier in the day?

You can cut it up to 4 hours ahead and keep it covered in the fridge. Hold off on battering until about 20 minutes before frying; batter that sits too long on the onion pulls moisture and gets gummy.