Seafood Mustard Sauce
by Sommer Collier — last updated on May 17, 2026 My seafood mustard sauce is the quick 5-ingredient dip I make whenever I want seafood to taste restaurant-quality. I whisk together bold, creamy ingredients into a spicy mustard sauce that’s incredible with shrimp, crab legs, oysters, or lobster. It’s simple, packed with flavor, and instantly upgrades any seafood spread.
I love to eat seafood year-round, and whether it’s giant crab legs or juicy and tender shrimp, nothing pairs better with fresh shellfish than a bold and tangy dipping sauce. This 5-ingredient seafood sauce has become my absolute favorite dip. It’s light and perky with a mellow base of mayonnaise, a strong tangy note from mustard, and a pop of spicy heat from onions and horseradish. It’s got the classic kick of my famous cocktail sauce recipe, but it doesn’t overpower all the fresh, sweet flavors of the seafood. I came up with this recipe because I was looking for a seafood sauce my daughter would like. And it turned out so good, that this sauce has become a household favorite condiment! I don’t just serve it with seafood… I’ve tried it on sandwiches, grilled halibut and salmon, steaks, and even roasted veggies.
Jessica – ⭐⭐⭐⭐⭐ I made this sauce with our shrimp last night and it was incredible! Definitely our new go to condiment!
Table of Contents
Sommer’s Recipe Highlights
Ready in Minutes – I love to make this sauce when I’m short on time because it all comes together in a matter of minutes. Like with my spicy tartar sauce recipe, you don’t need to sautee or cook any of the ingredients. Just toss them all into a bowl, mix them up with a fork, and you’ve got yourself a bold, tangy, and fiery dip to spice up your seafood!
Perfect for Seafood – We’re all used to a classic cocktail sauce when it comes to seafood, but it’s kind of limiting. My mustard sauce pairs incredibly with everything from shellfish like oysters, shrimp, and crab, to thick fillets of salmon, grouper, and even fried calamari. It adds a touch of elegance to seafood dishes that no other sauce can match!
Key Ingredients and Tips
- Low-Fat Mayonnaise – To make the base of this creamy and thick sauce, I always use a low-fat version of mayo. It helps to keep it light, while not losing any flavor. Of course, full-fat mayo is fine as well.
- Yellow Mustard – I use French’s Classic to get that signature bold and tangy flavor. Plus, it adds a gorgeous yellow color. Dijon mustard can also be used, but the color won’t be as bright.
- Worcestershire Sauce – Just a dash of this stuff gives enough of that umami richness and savory flavor that seafood dipping sauces are known for!
- Shallots – A handful of fresh, grated shallots adds that pop of oniony flavor that I absolutely love and a subtle crunch to each bite.
- Horseradish – To get that fiery kick, a little bit of store-bought horseradish goes a long way! Be sure to use “prepared horseradish”, and not fresh horseradish! If you have horseradish from your garden, you can prepare it for this sauce recipe by grating it and mixing it with a bit of water, white vinegar, and salt!
How to Make
Find the full recipe with ingredient proportions, detailed instructions, and a video tutorial in the printable form at the bottom of the post.
Grate – I start this delicious seafood sauce by grating the shallots super fine. Trust me, this little step makes a huge difference because you get all that amazing onion flavor without any big crunchy bites. If your eyes start watering, I like to pop the shallot in the freezer for about 10 minutes first. It helps a ton! And if you don’t have a grater, you can mince them very finely with a knife, but the grated texture makes the sauce extra smooth and restaurant-worthy.
Combine – Next, I toss the grated shallots into a bowl with the mayo, mustard, Worcestershire sauce, and horseradish. I like using a whisk instead of a spoon because it helps everything blend together into a silky, creamy sauce with no lumps hiding in there. And don’t be shy about tasting as you go! Some horseradish brands are MUCH hotter than others, so I always adjust depending on how spicy I’m feeling.
Mix – Then I give everything a really good mix and pop the sauce in the fridge for a bit before serving. Honestly, this sauce gets SO much better after it chills because the flavors have time to mingle together and mellow out. Even 30 minutes helps, but if you can make it a few hours ahead? Even better. It turns into one of those “what IS in this?” kind of sauces everyone keeps dipping into.
Recipe Variations
- Extra heat – When I want this sauce to really wake people up, I sprinkle in a little cayenne pepper or add a few dashes of Tabasco. Start small though… this sauce can go from zippy to fire-breathing dragon real fast.
- Lemon – Sometimes I squeeze in a little fresh lemon juice or add a pinch of lemon zest to brighten everything up. This is especially delicious with shrimp, crab legs, or fried seafood.
- Sour cream – If I want the sauce extra creamy and a little lighter tasting, I swap part of the mayo for sour cream. Greek yogurt works too in a pinch!
- Herbs – Fresh herbs make this sauce taste fancy with almost zero effort. I love adding chopped parsley, dill, or chives, depending on what seafood I’m serving. Dill is especially amazing with salmon or crab.
Serving Suggestions
This creamy mustard sauce pairs deliciously with just about any seafood you can imagine. I always make a big enough bowl whenever I’m serving seafood because it’s one of those dips you just can’t get enough of. Here are some of my favorite ways to enjoy this seafood mustard sauce:
- Shrimp
- Crab claws and legs
- Lobster tails
- Grilled oysters or clams
- Halibut, seabass, or grouper
- Brushed over salmon before grilling or baking
And if seafood isn’t your thing, don’t worry, this bold and creamy mustard dip is ridiculously versatile. I love drizzling it over juicy steaks, crispy chicken thighs, baked ham, or pork chops when I want an easy sauce that instantly makes dinner taste more special. It’s also fantastic spooned over roasted vegetables or served with hot, crispy French fries for dipping. Honestly, sometimes I even set it out as an unexpected chip dip for parties or slather it onto sandwiches and burgers as a flavorful, perky spread. Once you make it, you’ll start finding excuses to put it on just about everything!
Storing
This mustard should be kept in the fridge when not being served. Some mustards can stay at room temperature; however, the horseradish in this dish needs to be refrigerated. Place it in an airtight container or jar and refrigerate for up to 3 weeks.
Frequently Asked Questions
Hmmm… any health benefits would come from the mustard and horseradish. Mustard seeds provide power-packed omega-3 fatty acids and calcium. They are also known to be antibacterial, antifungal, and even anti-inflammatory. Horseradish is a root vegetable packed with antioxidants and natural compounds that help with digestion, fight bacteria, and can help clear sinuses.
Although you can use any mustard in this recipe, classic yellow mustard provides the best color, tang, and spice level that appeals to most people.
Totally! I actually think it tastes even better when all the flavors have had some time to settle and chill. I sometimes make this several days in advance. then just stir it again before serving to make sure it’s smooth.
More Seafood Dishes
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Seafood Mustard Sauce
Ingredients
- 2/3 cup low-fat mayonnaise (gluten-free)
- 1/4 cup French’s Classic Yellow Mustard
- 1 1/2 teaspoons Worcestershire sauce
- 1 teaspoon grated shallots
- 1/2 teaspoon prepared horseradish
Instructions
- Grate the shallots with a microplane or cheese grater.
- Measure all the ingredients and place them in a small mixing bowl.
- Stir well to combine. Then cover and chill until ready to serve.
I used S&B oriental mustard powder instant of prepared mustard or horseradish. That S&B stuff is HOT, like Chinese restaurant hot, like wasabi hot!!!! Mixed with water to make a paste, added mayo, lemon juice, hot sauce, and black pepper. It was still super hot so mellowed it out with sweet relish and rose wine balsamic. That toned it down a lot. Served with steamed shrimp and oysters on the half shell. Everyone loved it but agreed a little goes a long way. We were thinking it might be really good putting that on good-quality hot dogs with some sauerkraut. Labor Day is coming up! Thanks for the inspiration!
I have enough left over I’m thinking of making a potato salad with it. Maybe add some seafood to it also. It also would be great to mix in for deviled eggs or as a sandwich spread. I’m feeling my Labor Day taking shape. Again, THANKS!
This is absolutely the best mustard sauce I’ve ever made! You can put this on a car bumper and it’d be delicious! I use Dijon instead of yellow mustard cuz I like the heat but the shallot is what makes this IMO.
Glad you didn’t say flip-flop. HeHe.
That spicy mustard is so good on seafood! It gives it a nice flavor!
I made this sauce with our shrimp last night and it was incredible! Definitely our new go to condiment!
I’ve been doing this sauce for years, but I add fresh garlic and little honey ?
these are some great meals for the beach
Thank you for such a great recipe. My husband’s family tradition is fondu on Christmas Eve. We have wanted a non sweet mustard sauce for dipping. This was it! Balanced and wonderful. It will be used in our family on Christmas Eve every year!
Thanks again. It takes courage to publish a recipe. I appreciate your courage.
It is wonderful to be here with everyone, I have a lot of knowledge from what you share, to say thank you, the information and knowledge here helps me a lot
I made this last week for a party and it was a huge it! The mustard flavor really accented the seafood. I used the leftovers on ham sandwiches and that was great too.
Hi Sara,
Thanks so much for reporting back. I’m so glad you liked it!! :)
YUM!! This was really delicious – thank you for sharing with me! I ended up using more horseradish, like you suggested