Benihana Mustard Sauce Copycat Recipe: Tangy Japanese-Style Dipping Delight

This copycat version captures the signature tangy-sweet flavor of Benihana’s famous mustard sauce with simple pantry staples.

With just 5 ingredients and 5 minutes, you’ll have a versatile dipping sauce that elevates everything from hibachi-style proteins to crispy appetizers.

Ingredients for Benihana Mustard Sauce Copycat

Five simple ingredients recreate that iconic tangy-sweet Benihana magic at home.

The mustard is non-negotiable—Grey Poupon Dijon or similar premium brand delivers the right sharpness. Hellmann’s mayonnaise gives that signature creaminess, though any full-fat version works. Rice vinegar adds the authentic Japanese touch, but apple cider vinegar in a pinch won’t disappoint. Look for these in the international aisle or near the salad dressings.

No Dijon? Yellow mustard with a pinch of turmeric gets you close but lacks depth. Out of rice vinegar? White wine vinegar at half the amount works. For soy sauce, tamari is a great gluten-free swap with similar umami. The sugar can be replaced with honey or agave, but adjust to taste since they’re sweeter.

This keeps well in the fridge for 10-14 days in an airtight container. Stir before using as it may separate slightly. For longer storage, freeze in ice cube trays for up to 3 months.

Step-by-Step Instructions for Benihana Mustard Sauce

This straightforward method replicates the restaurant’s signature dipping sauce with precision.

Step 1: Combine Mayonnaise and Dijon Mustard

In a medium mixing bowl, add the 0.5 cup Mayonnaise and 0.5 cup Dijon Mustard. I use full-fat mayonnaise for optimal creaminess and smooth Dijon for consistent texture. The ratio is intentionally equal—this balance creates the distinctive tangy richness that defines this sauce.

Whisk the two ingredients together until completely smooth and homogeneous. You should see no streaks or separation. This base mixture provides the creamy foundation that carries all subsequent flavors while maintaining the proper thickness for dipping.

Step 2: Incorporate Rice Vinegar and Soy Sauce

Add the 2 tbsp Rice Vinegar and 1 tbsp Soy Sauce to the mayonnaise-mustard mixture. The rice vinegar contributes the essential acidic brightness that cuts through the richness, while the soy sauce adds the umami depth characteristic of Japanese flavors.

Whisk vigorously for 30-45 seconds until the liquids are fully emulsified into the base. The sauce will lighten slightly in color and develop a glossy sheen. If you’re using low-sodium soy sauce as recommended, taste at this stage—you may want to adjust seasoning later, though this recipe typically requires no additional salt.

Step 3: Dissolve and Integrate Granulated Sugar

Sprinkle the 1 tbsp Granulated Sugar evenly over the surface of the mixture. The sugar serves a dual purpose: it subtly sweetens the sauce to balance the acidity and sharpness while helping to stabilize the emulsion.

Whisk for another 1-2 minutes until the sugar is fully dissolved and no grains are visible. The final sauce should have a smooth, velvety texture with no separation. At this point, the sauce is complete and ready to use, though I recommend letting it rest for 10-15 minutes to allow the flavors to meld completely.

Step 4: Adjust and Rest for Optimal Flavor

Taste the sauce and make any final adjustments. The ideal balance should be tangy with a creamy finish, slightly sweet, and just savory enough from the soy sauce. If needed, you can add a pinch more sugar for sweetness or a few drops more rice vinegar for acidity, but this formulation typically requires no modifications.

Transfer to a serving bowl and let it sit at room temperature for 10-15 minutes before serving. This resting period allows the flavors to harmonize fully. The sauce will thicken slightly as it rests but remains perfectly dip-able. Serve with grilled meats, seafood, or vegetables as you would at Benihana.

Perfect Pairings for These Flavors

Hibachi Protein Pairings

This sauce shines with grilled chicken, shrimp, or steak hot off the hibachi grill. I love dipping 1-inch chicken cubes right after they come off the heat—the contrast of warm meat and cool sauce is perfect. 🍗

Vegetable Dippers

Zucchini, mushrooms, and onions from your hibachi spread taste amazing with this sauce. For raw options, try carrot sticks or cucumber slices. The tangy flavor cuts through the natural sweetness of fresh veggies.

Appetizer Matches

Use as a dip for crispy spring rolls or tempura vegetables. I’ve even served it with potato skins for a fusion twist. The creamy texture clings beautifully to fried foods, adding a flavor boost to every bite.

Rice and Noodle Boost

Drizzle over steamed white rice or lo mein noodles for extra flavor. A little goes a long way—start with 1 tablespoon per serving. The sauce adds moisture and depth to plain carbs without overpowering them.

Burger and Sandwich Spread

Swap mayo for this sauce on teriyaki burgers or chicken sandwiches. I spread about 2 tablespoons on each side of the bun. It adds a Japanese-inspired twist that pairs well with grilled meats and crisp lettuce. 💡

Seafood Companion

It’s fantastic with grilled salmon or seared scallops. The acidity balances the richness of fatty fish, while the creaminess complements delicate shellfish. I always keep a batch ready for seafood nights.

Frequently Asked Questions