Blooming Onion Sauce is the creamy, tangy, slightly spicy dipping sauce that makes a crispy blooming onion so irresistible. Inspired by the famous restaurant-style sauce served with blooming onions, this easy copycat recipe combines mayonnaise, ketchup, horseradish, spices, and a touch of sweetness to create a rich sauce that’s perfect for dipping.
The best part is that you can make this sauce in just a few minutes with ingredients you probably already have in your kitchen. It doesn’t require cooking, special equipment, or complicated techniques. Simply mix everything together, chill it for a little while, and you’ll have a flavorful dipping sauce ready for crispy onions, fries, chicken tenders, burgers, sandwiches, and more.
Ingredients
Main Ingredients
- ½ cup mayonnaise
- 3 tablespoons ketchup
- 1 tablespoon prepared horseradish
- 1 teaspoon Dijon mustard
- 1 teaspoon paprika
- ½ teaspoon garlic powder
- ½ teaspoon onion powder
- ¼ teaspoon black pepper
- ¼ teaspoon cayenne pepper
- 1 teaspoon lemon juice
- 1 teaspoon Worcestershire sauce
- 1 teaspoon granulated sugar
- ¼ teaspoon salt
Optional Ingredients
- ½ teaspoon smoked paprika
- ½ teaspoon hot sauce
- ½ teaspoon pickle juice
- 1 teaspoon finely minced fresh garlic
- ¼ teaspoon celery salt
For Garnishing
- A pinch of paprika
- Chopped fresh parsley
- Thinly sliced green onions
- Freshly cracked black pepper
Why These Ingredients Work
Mayonnaise creates the creamy base of the sauce, while ketchup adds sweetness, acidity, and color. Prepared horseradish provides the distinctive spicy kick that makes this dipping sauce stand out. Dijon mustard adds tanginess and depth, while paprika, garlic powder, onion powder, and black pepper build the savory flavor.
A small amount of sugar balances the acidity and heat, while lemon juice brightens the sauce. Worcestershire sauce contributes a deep savory flavor that makes the finished sauce taste more complex.
How To Blooming Onion Sauce
Step 1: Measure the Ingredients
Start by measuring all of your ingredients before mixing.
In a medium bowl, add:
- Mayonnaise
- Ketchup
- Horseradish
- Dijon mustard
- Paprika
- Garlic powder
- Onion powder
- Black pepper
- Cayenne pepper
- Lemon juice
- Worcestershire sauce
- Sugar
- Salt
Having everything ready makes the sauce quick and easy to prepare.
Step 2: Mix the Base
Use a whisk or spoon to mix the mayonnaise, ketchup, horseradish, and Dijon mustard together.
Continue stirring until the mixture becomes smooth and evenly colored.
There should be no large streaks of ketchup or mayonnaise remaining.
Step 3: Add the Seasonings
Add the paprika, garlic powder, onion powder, black pepper, cayenne pepper, and salt.
Stir thoroughly so the spices are distributed throughout the sauce.
For a smoky version, add smoked paprika along with the regular paprika.
Step 4: Add the Tangy Ingredients
Pour in:
- Lemon juice
- Worcestershire sauce
Stir again until completely combined.
These ingredients help balance the richness of the mayonnaise and give the sauce its characteristic tangy flavor.
Step 5: Add the Sugar
Add the granulated sugar.
Mix until the sugar completely dissolves into the sauce.
The sweetness should be subtle. It shouldn’t make the sauce taste like a sweet dip, but it should help balance the spicy horseradish and cayenne.
Step 6: Taste and Adjust
Taste the sauce before refrigerating it.
If you want more heat, add additional horseradish or cayenne pepper.
If you prefer more sweetness, add a small amount of sugar.
For more acidity, add a few drops of lemon juice.
For extra smokiness, add smoked paprika.
Step 7: Refrigerate
Cover the bowl with plastic wrap or transfer the sauce to an airtight container.
Refrigerate for at least:
30 minutes
For the best flavor, refrigerate it for:
1 to 2 hours
This resting time allows the spices and other ingredients to blend together.
Step 8: Stir Before Serving
Remove the sauce from the refrigerator and stir well.
The sauce may become slightly thicker as it chills.
If necessary, add a tiny amount of lemon juice or pickle juice to loosen the consistency.
Step 9: Garnish
Transfer the sauce to a serving bowl.
Sprinkle a small amount of paprika over the top.
Add fresh parsley or green onions if desired.
Step 10: Serve
Serve chilled or slightly cool alongside a crispy blooming onion.
This sauce is also delicious with:
- French fries
- Onion rings
- Chicken tenders
- Chicken wings
- Burgers
- Sandwiches
- Potato wedges
- Fried shrimp
You Must Know
Chill the Sauce
Although you can eat the sauce immediately, chilling allows the flavors to develop. Even 30 minutes makes a noticeable difference.
Adjust the Horseradish
Horseradish varies in strength. Start with a tablespoon and add more if you want a stronger spicy flavor.
Don’t Overdo the Cayenne
The horseradish already provides heat, so cayenne should be added gradually.
Use Good Mayonnaise
Because mayonnaise makes up the majority of the sauce, its flavor matters. Choose a creamy mayonnaise that you enjoy.
Fresh Lemon Juice Works Best
Fresh lemon juice provides brighter acidity than bottled lemon juice.
Balance Is Important
The best sauce should have a balance of creamy, tangy, sweet, savory, and spicy flavors.
Let the Sauce Rest
The spices may taste sharp immediately after mixing. Refrigerating the sauce allows everything to mellow and combine.
Make It Ahead
This sauce is excellent for preparing ahead of time. Store it covered in the refrigerator until you’re ready to serve.
Don’t Add Too Much Liquid
Too much lemon juice, Worcestershire sauce, or pickle juice can make the sauce thin.
Taste Before Serving
Always taste after chilling because the flavor can change slightly as the ingredients blend.
Topping Variations
Extra Spicy Sauce
For serious heat, add:
- Extra horseradish
- Cayenne pepper
- Hot sauce
- Crushed red pepper flakes
Add the heat gradually so you don’t overpower the creamy base.
Smoky Sauce
Replace some of the regular paprika with smoked paprika.
You can also add a small amount of chipotle powder for a deeper smoky flavor.
Garlic Sauce
Add 1 teaspoon of finely minced fresh garlic or roasted garlic.
This variation is especially delicious with French fries and chicken.
Honey Mustard Style
Add 1 tablespoon of honey and another teaspoon of Dijon mustard.
The result is sweeter and milder while still retaining the creamy texture.
Spicy Ranch
Add 1 tablespoon of ranch seasoning and a few drops of hot sauce.
This creates a creamy, tangy, spicy dipping sauce.
Chipotle Version
Add:
- ½ teaspoon chipotle powder
- 1 teaspoon lime juice
The smoky chipotle flavor pairs beautifully with fried foods.
Cajun Style
Add ½ to 1 teaspoon Cajun seasoning.
This variation is particularly good with fried shrimp, chicken, and potatoes.
Pickle Version
Add 1 teaspoon pickle juice and finely chopped dill pickles.
The tangy flavor works especially well with fried onions.
Lemon Pepper
Add:
- Lemon zest
- Fresh lemon juice
- Extra black pepper
This version is bright and refreshing.
Parmesan Garlic
Add freshly grated Parmesan and roasted garlic for a richer dipping sauce.
Make It A Meal
Blooming Onion Dinner
Serve the sauce with a crispy blooming onion alongside:
- Grilled chicken
- Baked potato
- Garden salad
This turns a popular appetizer into a complete restaurant-style dinner.
Burger Night
Use the sauce as a burger spread.
Serve with:
- Cheeseburgers
- French fries
- Pickles
- Coleslaw
The creamy, spicy sauce works particularly well with beef burgers.
Chicken Tenders
Serve crispy chicken tenders with a bowl of blooming onion sauce.
Add fries and a simple salad for an easy family meal.
Chicken Sandwich
Spread the sauce onto a crispy chicken sandwich.
Add lettuce, tomato, pickles, and red onion.
Fish and Shrimp
Use the sauce as a dipping sauce for fried shrimp, fish fillets, or fish sandwiches.
The acidity and spice help balance the richness of fried seafood.
Loaded Fries
Drizzle the sauce over crispy fries and add:
- Shredded cheddar
- Crispy bacon
- Green onions
- Jalapeños
Steak Dinner
Serve a small bowl of the sauce alongside grilled steak and roasted potatoes.
The creamy horseradish flavor works particularly well with beef.
Game Day Spread
Create a party platter with:
- Chicken wings
- Onion rings
- French fries
- Mozzarella sticks
- Chicken tenders
- Blooming onion
Place bowls of the sauce around the platter for easy dipping.
Sandwich Spread
Use it instead of mayonnaise on turkey, roast beef, ham, or chicken sandwiches.
Vegetable Dip
Serve with fresh vegetables such as:
- Carrots
- Celery
- Bell peppers
- Cucumber
- Broccoli
The creamy sauce makes a flavorful dip for a vegetable platter.
Pro Tips
Use a Whisk
A whisk combines the mayonnaise and ketchup smoothly and distributes the spices evenly.
Add Horseradish Gradually
If you’re sensitive to heat, start with less horseradish and increase it after tasting.
Refrigerate Before Serving
Don’t underestimate the difference that chilling makes. The sauce becomes more flavorful and cohesive after resting.
Make a Double Batch
This sauce is useful for far more than blooming onions. A double batch is convenient for parties, cookouts, and weekly meal prep.
Store in an Airtight Container
Keep the sauce refrigerated in a clean, sealed container.
Use Fresh Spices
Older spices can lose their intensity. Fresh paprika, garlic powder, and black pepper create better flavor.
Don’t Thin It Too Much
The sauce should be thick enough to cling to crispy food. Add liquid only a little at a time.
Balance the Heat
If the sauce becomes too spicy, add more mayonnaise and ketchup to mellow it.
Fix an Overly Sweet Sauce
If you accidentally add too much sugar, increase the lemon juice, mustard, or horseradish slightly.
Fix an Overly Tangy Sauce
Add a little more mayonnaise and a small pinch of sugar.
Let It Sit Overnight
For the strongest blended flavor, prepare the sauce the day before serving.
Serve in Small Bowls
A small serving bowl makes the sauce easy to access while preventing the entire batch from sitting out during a party.
Don’t Double Dip
If you’re serving the sauce to a crowd, provide individual dipping portions or use separate serving spoons.
Recipe FAQs
What is blooming onion sauce made of?
Blooming onion sauce is generally made with a creamy mayonnaise base combined with ketchup, horseradish, mustard, and a blend of spices. Recipes vary, but the combination creates a creamy, tangy, slightly spicy dipping sauce.
Is this exactly the same as the restaurant sauce?
This is a homemade copycat-style version inspired by the flavors commonly associated with restaurant blooming onion dipping sauce. It is not an official restaurant recipe.
Can I make it less spicy?
Yes. Reduce the horseradish and cayenne pepper. You can also add more mayonnaise to create a milder sauce.
Can I make it spicier?
Absolutely. Add more horseradish, cayenne pepper, hot sauce, or crushed red pepper flakes.
How long does blooming onion sauce last?
Store the sauce in an airtight container in the refrigerator and use it within several days, following the storage guidance for the perishable ingredients you use.
Can I freeze the sauce?
Freezing isn’t recommended because mayonnaise-based sauces can separate and develop an unpleasant texture after thawing.
Can I use Greek yogurt instead of mayonnaise?
Yes. Greek yogurt can replace some or all of the mayonnaise if you prefer a tangier, lighter sauce.
Can I use Miracle Whip?
Yes, but the sauce will be sweeter and have a different flavor profile. You may want to reduce or omit the added sugar.
What type of horseradish should I use?
Prepared horseradish works well. Avoid using a very sweet horseradish sauce if you want a more traditional savory flavor.
Can I use spicy brown mustard?
Yes. Spicy brown mustard adds extra tang and a slightly stronger mustard flavor.
Can I make this sauce ahead?
Yes. In fact, making it ahead is recommended. The flavors become more blended after refrigeration.
What can I serve with blooming onion sauce?
It’s excellent with blooming onions, onion rings, French fries, potato wedges, chicken tenders, wings, burgers, sandwiches, fried shrimp, and roasted vegetables.
Can I use this as a burger sauce?
Definitely. Spread it directly onto burger buns for a creamy, tangy, slightly spicy burger sauce.
How can I make it thicker?
Add a little more mayonnaise. Avoid adding too much liquid.
How can I make it thinner?
Add a very small amount of lemon juice, pickle juice, or water and mix until you reach the desired consistency.
PrintBlooming Onion Sauce (Outback Copycat Recipe)
This copycat Outback Steakhouse Blooming Onion Sauce is creamy, tangy, and spicy, with ingredients like sour cream, mayo, horseradish, and ketchup. It takes just 5 minutes to prepare and makes an irresistible dipper for everything from blooming onions to chicken tenders. It even works on burgers and sandwiches!
- Prep Time: 5 minutes
- Cook Time: 30 minutes
- Total Time: 35 minutes
- Yield: 8 1x
Ingredients
- ½ cup mayonnaise
- ½ cup sour cream
- 3 Tablespoons ketchup
- 2 Tablespoons horseradish sauce
- 1 teaspoon granulated garlic
- ½ teaspoon kosher salt
- ½ teaspoon dried oregano
- ½ teaspoon black pepper
- ¼ teaspoon cayenne pepper
Instructions
- Add all the ingredients to a medium-sized bowl.
- Whisk everything together until the mixture is smooth and well combined.
- Taste the sauce and adjust the seasoning if needed, adding more salt, cayenne, or horseradish to suit your preference.
- Cover the bowl with plastic wrap or transfer the sauce to an airtight container.
- Refrigerate for at least 30 minutes to let the flavors meld.
- Stir the sauce again before serving to ensure it’s evenly mixed. Enjoy!
