Outback Bloomin’ Onion Sauce Recipe (Easy 10-Minute Copycat)

If you’ve ever scraped the little cup clean and begged your server for more, this Outback Bloomin’ Onion Sauce is about to change your life. It’s the creamy, tangy, horseradish-spiked dip that makes the restaurant’s famous appetizer so addictive — and you can whisk up a batch at home in about 10 minutes with ingredients you almost certainly already have.

This copycat nails the flavor of the original: rich mayonnaise, a little ketchup for sweetness, sharp horseradish for bite, and a warm blend of paprika, garlic, and cayenne. Serve it alongside a crispy air fryer blooming onion, pile it next to a basket of air fryer onion rings, or spread it on a burger — it disappears every single time.

Looking for more restaurant favorites to make at home? You’ll find plenty over at Fork to Spoon.

Why You’ll Love This Copycat Sauce

It’s faster than a trip to the restaurant — one bowl, one whisk, and a few minutes of stirring. Every ingredient is a pantry or fridge staple, so there’s nothing special to hunt down. The heat is completely adjustable, which means you control exactly how much of a kick it has. And it’s endlessly versatile: what starts as a blooming onion dip quickly becomes your go-to sauce for fries, sandwiches, and grilled anything.

Ingredients You’ll Need

Here’s what goes into this blooming onion dipping sauce, and why each one matters. Exact amounts are in the printable recipe card below.

• Mayonnaise — the creamy base. A good-quality real mayo gives you the smoothest texture and best flavor.
• Ketchup — just a touch, for gentle sweetness and that signature blush color.
• Horseradish — the star of the show. It delivers the sharp, sinus-tingling bite that defines the sauce.
• Paprika — sweet, smoky depth and a warm reddish tone.
• Garlic powder — savory, aromatic backbone without any raw bite.
• Dried oregano — a subtle herbal note that rounds everything out.
• Cayenne pepper — the adjustable heat; start small and build up.
• Salt and black pepper — to season and sharpen all the flavors.

How to Make Outback Bloomin’ Onion Sauce

Step 1 — Combine everything. Add the mayonnaise, ketchup, horseradish, paprika, garlic powder, dried oregano, cayenne, salt, and black pepper to a small mixing bowl.

Step 2 — Whisk until smooth. Stir everything together until the sauce is even in color and completely blended, with no streaks of ketchup or clumps of spice.

Step 3 — Chill before serving. Cover the bowl and refrigerate for at least an hour (two is even better). This resting time lets the flavors marry and mellow into that unmistakable Outback taste.

Tips for the Best Sauce

Taste and adjust as you go — horseradish brands vary a lot in strength, so add it gradually and find your sweet spot. Use a high-quality mayonnaise, since it’s the foundation of the whole sauce. If you want a smoky twist, swap in smoked paprika. And don’t skip the chill time; it’s the single biggest difference between a good sauce and one that tastes just like the restaurant. If your sauce ends up thicker than you like, loosen it with a teaspoon of water or milk at a time until it’s perfect for dipping.

Easy Variations

Make it your own with a few simple swaps:

• No horseradish? Leave it out and add extra garlic powder, or a little Dijon mustard for a different kind of heat.
• Extra fiery. Stir in a tablespoon of Sriracha or a spoonful of chipotle in adobo.
• Garlic lover’s version. Fold in a clove or two of fresh minced garlic.
• Smoky BBQ fusion. Add a couple tablespoons of your favorite barbecue sauce for a Southern-style spin.

What to Serve With Blooming Onion Sauce

This sauce was born for a blooming onion, but it’s far too good to stop there. It’s incredible with crispy air fryer onion petals and homemade-style onion rings, and it turns everyday sides into something crave-worthy — think air fryer tater tots, French fries, or sweet potato fries. It also makes a fantastic burger spread, so it’s right at home whenever you’re planning what to serve alongside hamburgers.

If copycats are your thing, you’ll want to try the Outback Steakhouse remoulade sauce next, or browse the full collection of copycat Outback Steakhouse recipes.

Storage

Keep the sauce in an airtight container in the refrigerator for up to one week — the flavor only gets better after a day. Freezing isn’t recommended, because mayonnaise-based sauces tend to separate and turn grainy once thawed.

Frequently Asked Questions

What is Outback’s blooming onion sauce made of? It’s a creamy blend of mayonnaise and horseradish, brightened with a little ketchup and seasoned with paprika, garlic, oregano, cayenne, salt, and pepper. That mix of tangy, spicy, and creamy is what makes it so distinctive.

Can I make it ahead of time? Absolutely — it’s actually better made ahead. Prepare it up to a few days in advance and store it covered in the fridge so the flavors have time to develop.

How do I make it spicier or milder? Dial the horseradish and cayenne up or down. Start with less than the recipe calls for, taste, and add more until it hits your preferred heat level.

What can I use instead of horseradish? A little wasabi or Dijon mustard will give you a different but still delicious kind of heat. The flavor changes, but the sauce stays great.

Can I make a lighter or dairy-free version? Yes. Low-fat or vegan mayonnaise both work well here without sacrificing the creamy texture.

Is this sauce good on anything besides blooming onions? Definitely. Use it as a dip for fries and chips, a spread for burgers and sandwiches, or a sauce for grilled vegetables and chicken.

More Easy Air Fryer Recipes

• Air Fryer Onion Rings
• Air Fryer Onion Petals
• Air fryer Bloomin Onions
• Air Fryer Sweet Potato Fries
• Easy Air Fryer French Fries
• Air Fryer Tater Tots
• Air Fryer Nathan’s Onion Rings (or your favorite onion rings)

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