Creamy Dill Mustard Sauce for Salmon and More

Why You’ll Love This Recipe

• Easy, no-cook sauce that comes together in 10 minutes with simple ingredients.
• Perfect balance of creamy, tangy, herby, and lightly sweet flavors.
• Versatile drizzle for salmon, roasted potatoes, vegetable fritters, grain bowls, or salads.
• Makes an everyday meal feel restaurant-worthy with very little effort.

Grocery List

• Produce: Fresh dill, 1 lemon, 1 small garlic clove (or garlic powder, pantry), optional fresh herbs for garnish (chives or parsley).
• Dairy: Full-fat plain Greek yogurt, mayonnaise (or sour cream as a substitute).
• Pantry: Dijon mustard, whole-grain mustard, honey, extra-virgin olive oil, fine sea salt, black pepper.

Full Ingredients

Creamy Dill-Mustard Sauce

• 1/2 cup full-fat plain Greek yogurt (for tang and creaminess)
• 1/4 cup mayonnaise (for richness and a silky texture; can use sour cream instead)
• 1 1/2 tablespoons Dijon mustard (smooth, sharp mustard flavor)
• 1 tablespoon whole-grain mustard (for pops of texture and mellow mustard notes)
• 2 tablespoons fresh dill, finely chopped (packed, stems removed)
• 1 tablespoon fresh lemon juice (about 1/2 small lemon)
• 1 teaspoon finely grated lemon zest (optional but brightens the sauce)
• 2 teaspoons honey (balances the mustard and lemon)
• 1 tablespoon extra-virgin olive oil (adds gloss and a silky mouthfeel)
• 1 small garlic clove, very finely minced (or 1/4 teaspoon garlic powder)
• 1/4–1/2 teaspoon fine sea salt, to taste
• 1/8 teaspoon freshly ground black pepper (or more to taste)
• 1–3 teaspoons cold water, as needed to thin to desired consistency

Optional Garnishes & Serving Ideas

• Extra fresh dill fronds
• Lemon wedges or thin lemon slices
• Thinly sliced chives or fresh parsley
• Serve with: seared or baked salmon, roasted baby potatoes, crispy vegetable fritters, or grilled vegetables.

Step-by-Step Instructions

Step 1: Prep the fresh flavors

Start by preparing your fresh ingredients so they are ready to go. Finely chop the fresh dill, removing any tough, thick stems and focusing on the feathery fronds for the best texture and flavor. Mince the garlic as finely as you can so there are no large, harsh bits in the finished sauce; you want it to blend smoothly into the creaminess. Wash and dry the lemon, then finely grate 1 teaspoon of zest, taking care to avoid the bitter white pith. Finally, cut the lemon in half and squeeze out 1 tablespoon of juice, straining out any seeds. Having these ingredients prepped makes the whisking step quick and easy.

Step 2: Make the creamy base

In a medium mixing bowl, add the Greek yogurt and mayonnaise. Whisk them together thoroughly until the mixture is completely smooth and cohesive, with no streaks of plain yogurt or mayonnaise remaining. This creamy base is what will carry all the bright, tangy flavors, so take a minute to get it really well blended. If you are substituting sour cream for the mayonnaise, whisk it in the same way until the texture is velvety and uniform.

Step 3: Whisk in mustard, lemon, and honey

To the creamy base, add the Dijon mustard, whole-grain mustard, lemon juice, lemon zest (if using), honey, and olive oil. Whisk vigorously until everything is fully combined. At first it may look a little separated, but as you whisk the olive oil will emulsify into the mixture, creating a glossy, silky texture. Taste a tiny bit at this stage: you should get a pleasant kick of mustard, a gentle sweetness from the honey, and brightness from the lemon.

Step 4: Add dill, garlic, and seasoning

Now stir in the chopped dill and minced garlic. Sprinkle in 1/4 teaspoon of fine sea salt and the black pepper. Whisk or stir until the herbs and seasonings are evenly distributed throughout the sauce. The dill should be speckled all through the mixture, giving it a fresh green appearance. Taste the sauce and adjust: add more salt for overall flavor, more lemon juice for tang, or a tiny drizzle more honey if you prefer a softer, less sharp mustard bite.

Step 5: Adjust consistency to a silky drizzle

To turn this into a perfect drizzle for salmon, roasted potatoes, or vegetable fritters, you may want it slightly thinner. Add cold water, starting with 1 teaspoon, and whisk until smooth. Continue adding water, 1 teaspoon at a time, until the sauce is just loose enough to slowly fall off a spoon in a ribbon, but still thick enough to cling to food. The ideal texture is similar to a loose sour cream or thick salad dressing. Go slowly so you do not accidentally thin it too much.

Step 6: Chill, serve, and enjoy

For the best flavor, cover the bowl and chill the sauce in the refrigerator for at least 15 minutes and up to 24 hours before serving. This short rest allows the dill, garlic, and mustards to mingle and mellow, resulting in a more cohesive, rounded flavor. When ready to serve, give the sauce a quick stir. Drizzle generously over hot seared or baked salmon, tuck into a bowl for dipping roasted potatoes, or spoon over crispy vegetable fritters. Garnish with a few extra dill fronds or a thin slice of lemon for a fresh, vibrant look.

Pro Tips

• Use full-fat dairy: Full-fat Greek yogurt (and mayonnaise or sour cream) gives the creamiest, most luxurious texture and keeps the sauce from tasting overly tangy.
• Chop dill very finely: Tiny pieces of dill blend smoothly into the sauce, giving you flavor in every bite without stringy bits.
• Balance at the end: Always taste after mixing; a pinch more salt, a squeeze of lemon, or a few extra drops of honey can transform the sauce from good to outstanding.
• Thin slowly: Add water in tiny amounts so you can stop exactly at your preferred consistency—thicker for dipping, thinner for drizzling.
• Let it rest: If time allows, chilling for at least 30 minutes deepens the flavor and softens the bite of raw garlic and mustard.

Variations

• Lighter version: Use low-fat Greek yogurt and reduce the mayonnaise to 2 tablespoons. You may need to add an extra teaspoon of olive oil to keep it silky.
• Smoky dill-mustard sauce: Add 1/4 teaspoon smoked paprika and a tiny pinch of cayenne for a subtle smoky, gently spicy kick, especially good with roasted potatoes and grilled vegetables.
• Herb garden twist: Replace half of the dill with finely chopped fresh parsley or chives for a more mixed-herb profile that works beautifully on salads and grain bowls.

Storage & Make-Ahead

Transfer the sauce to an airtight container and refrigerate for up to 3–4 days. Because it contains fresh herbs and dairy, do not leave it at room temperature for more than 2 hours. The sauce will often thicken slightly as it chills; simply stir in 1–2 teaspoons of cold water or lemon juice before serving to loosen it back to a drizzleable consistency. This recipe is excellent to make ahead: prepare it in the morning (or the night before), chill, and then pull it out when your salmon, roasted potatoes, or fritters are ready. For best flavor and appearance, avoid freezing, as the dairy may separate and the fresh dill will lose its bright color.

Nutrition (per serving)

Approximate values per 2-tablespoon serving (1/8 of the recipe): about 70 calories, 7 g fat, 1 g saturated fat, 2 g carbohydrates, 1 g sugar, 1 g protein, 90 mg sodium. These values are estimates and will vary based on the specific brands and exact measurements you use.