You’ll only need five simple ingredients plus a little water and a small bowl to make this creamy mustard sauce. Use it as a drizzle or a dip — it’s excellent with chicken, sausage, burgers, wraps, and sandwiches.

After sharing a 3-ingredient honey mustard recently, I wanted a sauce with a bolder, savory mustard profile that stayed incredibly easy to prepare. After a few tests, this Easy Mustard Sauce delivers big mustard flavor with minimal effort — a must for mustard lovers.
Besides being fast to make, this sauce is compatible with many dietary preferences: dairy-free, gluten-free, refined-sugar-free, Paleo, Keto, and Whole30. Just be sure to choose a mayonnaise that meets the specific dietary need if that matters to you.

You might wonder why mayonnaise is included in a mustard sauce. There are two practical reasons. First, mayonnaise is the base for many creamy sauces — essentially a convenient blend of oil, egg, lemon, and seasonings — so using it saves time. Second, its mild flavor softens and balances the tangy, assertive character of mustard, yielding a smoother finish.
I recommend a high-quality, unsweetened dairy-free mayo for the best results. Popular options include mayonnaises made with avocado oil or other neutral oils; choose your favorite brand. I like Tessemae’s, Primal Kitchen, and Chosen Foods, but any good, unsweetened mayo will work.
For the mustard component, dijon is the preferred choice here. Dijon has a creamier texture and less vinegar bite than standard yellow mustard, which pairs perfectly with the mayo. Garlic and salt brighten the flavor, and a splash of water thins the sauce so it will drizzle smoothly. That’s all there is to it.

This sauce is versatile: drizzle it over roasted vegetables or crispy potatoes, use it on sandwiches, burgers, and wraps, or serve it alongside chicken, beef, or sausage. It also pairs well with grain bowls or as the finishing touch on roasted or grilled dishes.
More recipes you might like:
3-Ingredient Honey Mustard
Creamy Avocado Dressing & Dip
Comeback Sauce
Creamy Red Pepper Sauce
Dairy Free Ranch Dressing & Dip

Easy Mustard Sauce
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Ingredients
- 1/2 cup mayonnaise
- 2 tbsp dijon mustard
- 2 tbsp water
- 1 tsp lemon juice
- 1 tsp garlic, minced
- 1/4 tsp salt
Instructions
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In a small bowl, stir together the mayonnaise, dijon mustard, water, lemon juice, minced garlic, and salt until smooth. Taste and adjust salt or water to reach your preferred balance of creaminess and mustard intensity.
Notes
This recipe doubles easily for a crowd or halves well for fewer servings.
Store any leftover sauce in an airtight container in the refrigerator.
Nutrition
Nutrition information is automatically calculated and should be used as an approximation.
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