Cajun Horseradish Sauce Recipe: Bold Kick With Creamy Depth

This sauce delivers a creamy base with a bold Cajun kick that elevates any dish it touches. The horseradish adds the perfect sharp bite.

Whisk it together in minutes using simple ingredients, then store in the fridge for up to a week. It pairs perfectly with seafood, sandwiches, or as a dipping sauce.

Ingredients for Cajun Horseradish Sauce

Nine simple ingredients create this bold, creamy sauce with a spicy kick.

The foundation starts with full-fat mayonnaise and sour cream—don’t skimp on quality here. Hellmann’s or Duke’s for mayo, and any thick sour cream from Kroger or Publix works. The horseradish is key: Bubbies or Silver Spring brands have the best punch (the refrigerated kind, not shelf-stable). Cajun seasoning can be Tony Chachere’s or a homemade mix if you’re feeling fancy.

No horseradish on hand? Fresh grated at half the amount works, but it’s milder. Swap Cajun seasoning for creole seasoning at equal parts—similar vibe. If you’re avoiding mayo, Greek yogurt (strained) can sub in a pinch, though the texture changes slightly. The lemon juice keeps it bright, but lime or apple cider vinegar also cuts through the richness nicely.

This keeps 7-10 days in the fridge in a sealed jar. The flavors meld and deepen over time, so it’s actually better after a day or two. Not freezer-friendly—dairy separates when thawed. Stir well before using if it’s been sitting.

Step-by-Step Instructions for Cajun Horseradish Sauce

Combine these bold flavors in the right order for a perfectly balanced, creamy sauce every time.

Step 1: Establish the Creamy Base

In a medium mixing bowl, combine the 1 cup Mayonnaise and 0.5 cup Sour Cream. Whisk vigorously until the mixture is completely smooth and homogenous. The sour cream adds thickness and a subtle tang that balances the richness of the mayonnaise.

I always use full-fat versions of both for the creamiest texture. You should see no streaks of white or yellow—just a single, pale cream color throughout. This base creates the perfect canvas for the bold flavors to come.

Step 2: Add the Tangy and Spicy Elements

Add the 3 tbsp Prepared Horseradish, 1 tbsp Dijon Mustard, and 1 tbsp Lemon Juice to the bowl. Stir well to fully incorporate these ingredients into the base mixture.

The prepared horseradish provides the signature kick, while the Dijon mustard adds depth with its sharp, tangy profile. The lemon juice brightens the sauce and keeps the flavors vibrant. At this stage, you’ll start to see the sauce develop its characteristic pale color with tiny flecks of horseradish.

Step 3: Incorporate the Savory and Bold Seasonings

Add the 1 tbsp Cajun Seasoning, 1 tsp Worcestershire Sauce, 0.5 tsp Hot Sauce, 0.5 tsp Garlic Powder, and 0.5 tsp Paprika. Stir thoroughly to distribute all the spices evenly throughout the sauce.

The Cajun seasoning brings the heat and complexity, while the Worcestershire sauce adds umami depth. The hot sauce enhances the spiciness of the horseradish, and the garlic powder and paprika round out the flavor profile with warmth and a hint of smokiness. The sauce will take on a slightly speckled appearance from the spices.

Step 4: Rest and Adjust for Optimal Flavor

Cover the bowl and let the sauce rest at room temperature for at least 30 minutes. This allows all the flavors to meld together and intensify. I’ve found that this resting period makes a significant difference in the final taste.

After resting, give the sauce a final stir. Taste and adjust the seasonings if needed—add a touch more horseradish for extra heat or a squeeze of lemon for additional brightness. The texture should be smooth and creamy, with a consistent color throughout. Serve immediately or store in an airtight container in the refrigerator for up to 1 week.

Dietary Considerations for These Flavors

Gluten-Free Adaptation

This sauce is naturally gluten-free as written, since none of the base ingredients contain gluten. However, always check your Cajun seasoning label—some blends include wheat flour as an anti-caking agent.

Dairy-Free Version

Swap the sour cream for dairy-free yogurt (like Kite Hill or Silk), and use Vegenaise instead of traditional mayo. The texture remains creamy, though the tang may be slightly milder. 💪

Lower-Fat Option

Replace full-fat mayo with light mayonnaise and use low-fat sour cream to reduce calories by about 30%. The flavor stays bold, but the sauce will be slightly less rich.

Egg-Free Adjustment

For those avoiding eggs, use vegan mayo (like Just Mayo) and ensure your Worcestershire sauce is anchovy-free. The horseradish and Cajun spices will still deliver that signature kick.

Spice Level Control

Reduce the prepared horseradish to 1 tbsp for a milder version, or omit the hot sauce entirely. If you love heat, add an extra ½ tsp of cayenne to the mix.

Allergen Note

Contains egg (from mayo) and dairy (from sour cream). For nut allergies, confirm your Cajun seasoning is processed in a nut-free facility. ✨

Frequently Asked Questions