Gravlax Mustard Sauce Recipe: Nordic-Inspired Creamy Tang

This Nordic-inspired mustard sauce is the perfect creamy complement to rich, cured salmon. It balances sweetness, tang, and a gentle mustard kick without overpowering the fish.

Whisk together in minutes with simple ingredients, then chill to let flavors meld. The result is a smooth, velvety sauce that elevates gravlax to restaurant quality.

Ingredients for Gravlax Mustard Sauce

Nine simple ingredients transform into a velvety Nordic sauce for gravlax.

The mustard is the foundation here. Maille or Grey Poupon Dijon deliver the right balance of heat and depth—avoid anything labeled ‘spicy’ as it can overpower the salmon. Whole Foods and Williams Sonoma carry excellent options. For the dill, look for bright green fronds with no wilting (the good stuff, not the pre-cut kind). Freshness is key since it’s a primary flavor.

No white wine vinegar? Apple cider vinegar at equal amounts works perfectly. Swapping honey for maple syrup keeps it vegan-friendly (though slightly less traditional). If you’re avoiding dairy, Greek yogurt for the sour cream maintains creaminess. The mayonnaise is flexible—use what you have, but Duke’s or Hellmann’s offer the best texture and neutral flavor.

This sauce keeps beautifully. Store in an airtight container for up to 5 days in the fridge. The flavors deepen after 24 hours, so make it a day ahead if possible. Not suitable for freezing—dairy can separate.

Step-by-Step Instructions for Gravlax Mustard Sauce

Master this technique for a silky, balanced sauce that perfectly complements cured salmon.

Step 1: Emulsify the Acid and Oil Base

In a medium bowl, whisk together the 2 tbsp Dijon Mustard, 1 tbsp Honey, and 1 tbsp White Wine Vinegar until fully combined. The mustard’s sharpness will mellow as it blends with the honey’s sweetness and the vinegar’s bright acidity.

Slowly drizzle in the 0.25 cup Extra-Virgin Olive Oil while whisking vigorously. This gradual incorporation creates a stable emulsion where the oil suspended in the acid base forms a creamy foundation. You’ll notice the mixture thicken and turn a pale golden color as the emulsion forms.

Step 2: Incorporate the Dairy Components

Add the 0.5 cup Sour Cream and 0.25 cup Mayonnaise to the bowl. The sour cream lends a tangy depth while the mayonnaise provides body and richness to the sauce. Whisk until smooth and completely homogeneous.

At this stage, the sauce should have a velvety texture that coats the back of a spoon. If you see any separation, continue whisking until fully combined. The natural emulsifiers in both the egg yolks from the mayonnaise and the sour cream will help maintain the sauce’s stability.

Step 3: Season and Infuse with Fresh Herbs

Stir in the 2 tbsp Fresh Dill, 0.25 tsp Salt, and 0.125 tsp White Pepper. The fresh dill adds a bright, grassy note that’s essential for authentic Nordic flavor, while the white pepper provides a subtle heat without the visual specks of black pepper.

Let the sauce rest for 10-15 minutes at room temperature to allow the flavors to meld. This brief waiting period lets the dill infuse throughout and the seasonings to fully integrate. Taste and adjust the salt if needed, though remember the sauce will be served with salty gravlax.

Step 4: Chill and Serve

Transfer the sauce to a covered container and refrigerate for at least 1 hour before serving. Chilling allows the flavors to develop further and the sauce to thicken slightly. The cold temperature also enhances the creamy texture.

When ready to serve, give the sauce a final whisk to restore its smooth consistency. Drizzle over thinly sliced gravlax or serve on the side for dipping. The sauce should have a perfect balance of creamy, tangy, and herbaceous elements that complement without overpowering the delicate fish.

Regional Styles of This Dish

Swedish Classic

In Sweden, gravlax mustard sauce often uses grainy mustard instead of Dijon for texture. I love adding 1 tsp sugar to balance the sharpness. The sauce is typically served on dark rye bread with fresh dill sprigs. 🌿

Norwegian Simplicity

Norwegians keep their version minimal—just Dijon mustard, sour cream, and chopped chives. They often fold in 1 tbsp grated horseradish for extra zing. This pairs perfectly with their lightly cured salmon.

Danish Sweetness

The Danes sweeten their sauce with 2 tbsp lingonberry jam mixed into the base. It creates a beautiful pink hue and fruit-forward contrast to the fish. I recommend Felix brand for authentic flavor. ✨

Finnish Tang

Finnish versions use apple cider vinegar instead of white wine vinegar, giving a fruitier edge. They also add 1 tsp prepared horseradish for heat. The result is bolder but still harmonious with gravlax.

Icelandic Herbal Touch

Icelanders incorporate 1 tbsp chopped tarragon alongside dill for complexity. They prefer a 50/50 mix of sour cream and Greek yogurt for extra tang. This version works wonderfully with their wind-dried fish.

Frequently Asked Questions