Arby's Super Roast Beef Sauce Recipe: Horsey Sauce Homemade Magic

This Arby's Super Roast Beef sauce recipe brings that iconic tangy-spicy kick to your kitchen—no fast-food trip required. The secret lies in balancing sweet ketchup with sharp horseradish and vinegar, creating a sauce that's bold, slightly sweet, and packed with that signature heat. I've perfected this recipe after years of testing, ensuring every spoonful delivers that familiar, addictive flavor.

The magic happens with a simple blend of pantry staples—ketchup as the base, horseradish for that signature bite, and a touch of vinegar to cut through the richness. A pinch of spices like mustard powder and black pepper rounds out the flavor, while a splash of Worcestershire sauce adds depth. The key is letting the sauce sit for at least 30 minutes before serving, allowing the flavors to meld and intensify.

What you’ll end up with is a homemade sauce that’s tangy, spicy, and just sweet enough—perfect for dipping, drizzling, or slathering on sandwiches. It keeps well in the fridge for up to 2 weeks, so you can make a big batch and enjoy it all week long. No more settling for the bottled version when you can have the real deal.

Use it on roast beef sandwiches, burgers, or even as a marinade for meats. The possibilities are endless, but the flavor is undeniably Arby’s—just better. Let’s get started!

Ingredients for arby's super roast beef sauce

Eight simple ingredients transform into that iconic Arby's tangy-spicy sauce.

The ketchup is your base—Heinz is the safest bet for that classic tang. Grab the prepared horseradish from the refrigerated section, not the jarred kind (it's way stronger). White vinegar should smell sharp, not stale—distilled is cheaper, but apple cider adds subtle fruitiness. Worcestershire sauce? Lea & Perrins is the gold standard, but any good brand works. Pro tip: measure the horseradish first—it's potent stuff, and you can always add more later.

No prepared horseradish? Fresh horseradish root works too—grate it and mix with a splash of vinegar to mellow the heat. Short on Worcestershire? Balsamic vinegar plus a pinch of smoked paprika gets you close. Mustard powder and garlic powder are non-negotiable for that signature kick—don't skip them. The sugar might seem odd, but it balances the heat. Brown sugar adds caramel notes if you want extra depth. And yes, you can make this without sugar if you're watching it, but it'll be sharper.

This sauce gets better with time—30 minutes minimum before using. Store in an airtight jar in the fridge for up to 2 weeks. Freeze for 3 months if you're making a big batch. I like to portion it into small jars so I can grab one for sandwiches without digging through the whole thing. The flavors meld beautifully overnight, so if you can make it ahead, do it—trust me.

Step-by-step instructions for Arby's super roast beef sauce

Here's how to recreate that iconic tangy, horseradish-forward sauce at home—simple but packed with flavor.

In a medium bowl, combine the 1 cup ketchup and 0.5 cup white vinegar. Stir well to blend them completely—this creates the foundation of the sauce. The vinegar adds brightness that balances the sweetness of the ketchup, so don't skip this step. I like to use a whisk for smooth, lump-free mixing.

Next, add the 0.25 cup prepared horseradish. This is the star ingredient that gives the sauce its signature kick. Stir it in thoroughly, but be careful—horseradish can be potent. If you're sensitive to spice, start with a little less and adjust to taste later. The mixture will turn a deeper red as the horseradish incorporates.

In a separate small bowl, mix together the 1 tsp mustard powder, 0.5 tsp garlic powder, 0.5 tsp onion powder, 0.5 tsp ground black pepper, and 0.5 tsp salt. This blend adds depth and warmth to the sauce. I always use freshly ground black pepper—it makes a noticeable difference in flavor.

Add this dry mixture to the ketchup-vinegar-horseradish combination and stir until fully dissolved. Then, sprinkle in the 1 tbsp granulated sugar and whisk again. The sugar helps balance the acidity of the vinegar and the heat of the horseradish, creating that perfect harmony. Taste the mixture now—it should be tangy, slightly sweet, and with a noticeable horseradish bite.

Pour in the 1 tbsp Worcestershire sauce and whisk vigorously until everything is fully combined. The Worcestershire sauce adds a savory, umami depth that ties all the flavors together. Let the sauce sit for 5 minutes at room temperature—this allows the flavors to meld and develop.

After resting, give it one final stir. The sauce should now be smooth, with a vibrant red color and a balance of sweet, tangy, spicy, and savory notes. If it's too thick, you can thin it slightly with a splash of water or vinegar, but it should be ready to use as is. This sauce is best when fresh, so I recommend making it just before serving.

Taste the sauce and adjust the seasoning if needed. If it needs more sweetness, add a pinch more sugar. If it's too tangy, a little more ketchup can help balance it. The key is to find that perfect equilibrium between the horseradish heat, the vinegar tang, and the sweetness.

This sauce is best used immediately on sandwiches, roast beef, or even as a dip. It keeps well in the refrigerator for up to 1 week in an airtight container, but it tastes freshest right after mixing. Serve it with your favorite roast beef sandwiches for that classic Arby's experience at home!

Troubleshooting this recipe

Horseradish Overpowering

If your sauce tastes like a fire alarm went off in your mouth, you’ve likely overdone the horseradish. Start with ¼ cup prepared horseradish and taste before adding more—it’s easier to fix an under-spiced sauce than one that’s too aggressive. For a milder version, reduce to 2 tablespoons and balance with an extra ½ teaspoon sugar. Freshly grated horseradish root is even stronger, so use 1 tablespoon grated root per ¼ cup prepared if substituting. 🌶️

Sauce Too Thin

A runny sauce means you need more body. Let it sit uncovered in the fridge for 15-20 minutes to thicken naturally. If it’s still too thin, mix in 1 teaspoon cornstarch with 1 tablespoon cold water, stir until dissolved, then add back to the sauce. Heat gently on the stove for 2-3 minutes to thicken further. Avoid over-thinning with extra ketchup—it’ll dilute the horseradish kick. 💧

Not Tangy Enough

If your sauce lacks that signature tang, boost the acidity with an extra 1 tablespoon white vinegar or ½ tablespoon lemon juice. For a deeper tang, add ½ teaspoon Dijon mustard—it adds complexity without overpowering. If the sweetness is off-balance, reduce sugar by ½ teaspoon and let the vinegar shine. Always taste as you go; adjustments are easier before the sauce sits. 🍋

Separation Issues

If oils or vinegar separate, whisk vigorously for 1 minute to re-emulsify. For stubborn separation, blend the sauce in a mini food processor for 10-15 seconds to break up any oil pockets. To prevent this, store the sauce in a glass jar (not plastic) and avoid shaking it vigorously—stir gently before each use. The horseradish is the culprit here; fresh horseradish is more prone to this than prepared. 🥫

Too Sweet or Bland

If the sauce tastes cloyingly sweet, reduce sugar by ½ teaspoon and add ½ teaspoon more vinegar to cut through it. For a blander sauce, boost the horseradish by 1 tablespoon or add ¼ teaspoon smoked paprika for depth. A pinch of cayenne pepper (just ⅛ teaspoon) can wake up a flat sauce without overpowering it. Always taste after resting—flavors evolve! 🍚

Storage Gone Wrong

If your sauce smells off or tastes sour after refrigeration, it’s past its prime. The shelf life is 1 week in the fridge or 3 months in the freezer—never risk it beyond that. To revive a slightly separated sauce, whisk in 1 teaspoon warm water and stir well. For freezer storage, use ice cube trays for single servings—thaw overnight in the fridge to preserve texture. Never refreeze thawed sauce. ❄️

Frequently asked questions