Sauces & Condiments
That signature Arby's roast beef sauce with its creamy, tangy, horseradish kick is easier to recreate than you think—and it’ll transform your sandwiches forever. I’ve been perfecting this recipe for years, and the secret lies in balancing the sharpness of horseradish with rich mayonnaise and just the right amount of vinegar for that signature tang. The sauce is foolproof, requiring only five ingredients and five minutes of prep, yet it delivers that restaurant-quality punch every time.
The magic happens when you mix the ingredients in the right order—starting with the mayo as your base, then adding the horseradish gradually to control the heat. A splash of vinegar brightens the flavors, while a pinch of salt and black pepper rounds out the taste. This sauce isn’t just for roast beef sandwiches; it’s a game-changer for burgers, fries, or even as a dip. The creamy texture coats every bite, making every sandwich feel like a trip to your favorite fast-food spot.
What you’ll end up with is a sauce that’s creamy, tangy, and just spicy enough to make your taste buds tingle. The horseradish adds a sharp, peppery bite that cuts through the richness, while the vinegar keeps it from being too heavy. It’s the kind of sauce that disappears fast—once you try it, you’ll never buy bottled again. Store it in the fridge for up to a week, and trust me, you’ll be reaching for it constantly.
Ready to make your sandwiches taste like they came straight from Arby’s? Here’s everything you need to bring that iconic flavor home. Let’s get mixing!
Ingredients for arby's roast beef sandwich sauce
Five ingredients, five minutes—this is your Arby's sauce game-changer right here.
| Ingredient | Amount | Notes |
|---|---|---|
| Mayonnaise 🥫 | 1 cup | Duh, the creamy base |
| Prepared Horseradish 🌶️ | ½ cup | The spicy kick |
| White Vinegar 🍶 | 1 tbsp | Brightens the tang |
| Diamond Crystal Kosher Salt 🧂 | ¼ tsp | Fine grain preferred |
| Freshly Ground Black Pepper 🌶️ | ¼ tsp | Freshly cracked is best |
The mayo is your base, so grab the best quality you can find—Hellmann's or Duke's are my go-tos, but anything creamy works. Prepared horseradish varies wildly in heat, so start with 0.5 cup and adjust to taste. If it's too mild, add more; if it's too spicy, cut back. I always buy mine from Trader Joe's—their brand is consistently strong. White vinegar is key for that signature tang, so don’t skip it. The Diamond Crystal kosher salt is a must; it dissolves perfectly and doesn’t clump.
No horseradish? Substitute 1 tbsp of prepared mustard—it won’t be identical, but it’ll add a sharp kick. Vinegar substitute? Lemon juice at half the amount works in a pinch. If your mayo is low-fat, the sauce will be less rich, so full-fat is worth it here. Freshly ground black pepper makes all the difference—pre-ground tastes like dust. Pro tip: Mix the ingredients in this order—mayo first, then horseradish, then vinegar and seasonings. Stirring gradually lets you control the heat and tang.
This sauce keeps for up to 1 week in the fridge, sealed in an airtight container. It actually tastes better the next day as the flavors meld. I make double batches because it disappears fast—sandwiches, burgers, fries, even as a dip. If you’re not using it all within a week, freeze it in ice cube trays for single-serving portions. Thaw overnight in the fridge, and it’ll be just as creamy.
Why You'll Love This Recipe
- Five-Ingredient Magic: I swear by this—just mayo, horseradish, vinegar, salt, and pepper. That’s it. No fancy gadgets, no waiting for the oven, no stress. The horseradish cuts through the richness while the vinegar keeps it sharp, and honestly? It’s the kind of sauce where you measure once and stir until it’s just right.
- Tangy Kick: Between us, this sauce is dangerously addictive. The horseradish brings that signature heat, but the mayo and vinegar balance it so it’s not overpowering—more like a slow burn you’ll crave. I’ll be real: once I made a double batch, and my husband stole half before I could even taste it.
- Game Day Ready: This sauce isn’t just for sandwiches. Slather it on fries, mix it into deviled eggs, or drizzle it over roasted veggies—it elevates everything. I’ve even used it as a quick marinade for grilled chicken when I’m short on time. (Yes, even on a Tuesday night.)
- Lasts All Week: Make a big batch and store it in the fridge—it keeps for ages without losing its punch. I’ve had it last me nearly two weeks, and it’s still bright and tangy. Plus, it’s cheap to make—way cheaper than buying sauce at the store. My wallet and my taste buds thank me.
Step-by-step instructions for Arby's-style roast beef sauce
This tangy, creamy sauce comes together in minutes—no fancy techniques needed.
Whisk Together the Creamy Base
In a medium bowl, combine the 1 cup mayonnaise and 0.5 cup prepared horseradish. Use a whisk or fork to mix until smooth and fully incorporated. The horseradish should blend evenly—no streaks should remain. If you're using a jar of prepared horseradish, give it a quick shake first to distribute any settled spices.
Here's the thing—don't rush this step. The horseradish has a tendency to clump, especially if it's thick. Stirring vigorously for about 30 seconds ensures you get that signature Arby's consistency. You'll know it's ready when the mixture looks uniform and pale yellow with just a hint of green from the horseradish.
Add Vinegar and Seasonings
Next, add the 1 tablespoon white vinegar, 0.25 teaspoon Diamond Crystal kosher salt, and 0.25 teaspoon freshly ground black pepper to the bowl. Whisk everything together until fully combined. The vinegar brightens the flavors and cuts through the richness of the mayonnaise, while the salt and pepper balance the heat.
Taste the mixture now—it should be tangy with a sharp horseradish kick and just the right amount of saltiness. If it needs more salt, add a pinch at a time (kosher salt dissolves easily, so you can adjust precisely). The pepper should be present but not overpowering. This is your chance to tweak before the sauce thickens further.
Let It Rest for Maximum Flavor
Cover the bowl with plastic wrap and refrigerate for at least 30 minutes. This resting period allows the flavors to meld together perfectly. The horseradish's heat will mellow slightly, and the vinegar's acidity will integrate more smoothly into the creamy base.
I know it's tempting to skip this step, but trust me—waiting ensures the sauce tastes like it's been simmering for hours, not just mixed together. If you're in a hurry, you can use it immediately, but the flavor will be even better after chilling. For the absolute best results, let it rest overnight—it keeps well in the fridge for up to 5 days.
Adjust Consistency Before Serving
Before using, give the sauce one final whisk to ensure everything is well combined. If it's too thick, thin it with 1 teaspoon of water or milk at a time until it reaches a smooth, spreadable consistency. The sauce should coat the back of a spoon easily—this is the perfect texture for slathering on roast beef sandwiches.
If you find it too spicy after chilling, you can balance it by adding a tiny bit more mayonnaise or a splash of vinegar. But honestly, this recipe is already spot-on for that classic Arby's flavor. Now it's ready to elevate your sandwiches, burgers, or even as a dip for fries—just like the pros do it!
Pro Tips For Making Arby'S Roast Beef Sandwich Sauce
- Mix Slowly: Stir the horseradish into the mayo gradually—drop by drop at first—so it doesn’t turn into a spicy sludge. I learned this the hard way after ending up with a sauce that could clear sinuses at 20 paces. ---
- Use Cold Ingredients: Chill the mayo, horseradish, and vinegar before mixing—room temperature ingredients separate or curdle. Pop them in the fridge for 10 minutes if you’re impatient (yes, even if you’re impatient like me). ---
- Salt in Layers: Add half the kosher salt before the horseradish, then taste and adjust after. Prepared horseradish is already punchy; you’ll regret over-salting if you dump it all in first. ---
- Pepper Last: Hold off on the black pepper until the very end—it loses its sharpness when mixed too early. A quick grind right before serving keeps it bright and zesty, just like Arby’s.
Pro cooking tips for perfect results
Horseradish Heat Control
Prepared horseradish varies wildly in spice level, so start with the 0.5 cup called for and adjust gradually. I always buy Trader Joe's brand because it's consistently strong—some store brands can be too mild. If your sauce is too spicy after mixing, balance it with 1 teaspoon more mayonnaise or a splash of vinegar. If it's too mild, add ½ teaspoon extra horseradish at a time until it hits that perfect kick. 🌶️
Mayo Quality Matters
Don’t skimp on the mayo—this is where the sauce gets its signature creaminess. I recommend Duke’s or Hellmann’s for that rich, stable texture. Low-fat mayo will make your sauce thinner and less flavorful. If you’re using a different brand, taste it first—some mayos have a stronger flavor that can overpower the horseradish. For the best results, let your mayo sit at room temperature for 10 minutes before mixing to make it easier to whisk smoothly.
Vinegar Brightness
The 1 tablespoon white vinegar is non-negotiable—it’s what gives the sauce that signature tang. If you’re out of white vinegar, apple cider vinegar works in a pinch, but it’ll add a slight sweetness. For a sharper taste, use rice vinegar instead. Add the vinegar last and whisk well to distribute it evenly. If your sauce tastes flat after mixing, a tiny extra splash of vinegar can wake up the flavors.
Resting for Best Results
This is where the magic happens—letting the sauce rest for at least 30 minutes (or overnight) allows the flavors to meld. The horseradish’s heat will mellow slightly, and the vinegar’s acidity will integrate more smoothly. I often make this sauce the night before so it’s ready to go in the morning. If you’re in a hurry, you can use it immediately, but the texture will be slightly thicker and the flavors less cohesive. 💫
Storage Secrets
Store your sauce in an airtight container in the fridge for up to 1 week. If it thickens over time, stir in 1 teaspoon of water or milk to restore its creamy consistency. For longer storage, freeze it in ice cube trays—just thaw overnight in the fridge. The sauce actually improves with age, so don’t be afraid to make a big batch. I keep mine in a small jar on the fridge shelf for quick access.
Pro Adjustments
If your sauce is too thick, thin it with 1 teaspoon of water or milk at a time. If it’s too thin, mix in 1 teaspoon of mayonnaise to thicken it up. For extra depth, add a pinch of garlic powder or onion powder—just ¼ teaspoon each—to mimic the subtle savory notes in the original. Taste as you go, and adjust gradually. The goal is that perfect balance of creaminess, tang, and heat that makes Arby’s sauce so addictive. ✨
Nutrition facts
Frequently asked questions
Can I make this sauce without prepared horseradish?
You can substitute with 1 tbsp prepared mustard plus ½ tsp extra vinegar for a similar sharp kick, though the flavor won't be identical. For authentic heat, fresh horseradish (grated) works best—use 1 tbsp grated fresh horseradish per 0.5 cup prepared in the recipe. The texture will be slightly chunkier but still delicious.
How do I adjust the spice level if my horseradish is too mild?
Start with the full 0.5 cup prepared horseradish and taste after mixing. If it's too mild, add ½ tsp more horseradish at a time until you reach that signature tangy kick. For extra depth without heat, a pinch of garlic powder or onion powder can enhance the savory notes. Always adjust gradually!
Can I use this sauce on other foods besides sandwiches?
This versatile sauce works perfectly on burgers, fries, hot dogs, or even as a dip for veggies. The creamy horseradish flavor pairs well with grilled meats and crispy foods. For fries, mix it with a little ketchup for a sweet-spicy dip. Just store leftovers in an airtight container.
Why does my sauce separate after refrigerating?
This happens when the mayo and horseradish aren't fully emulsified. Whisk vigorously for 1 full minute before refrigerating, and give it another good stir after chilling. If it's still too thick, add 1 tsp water or milk at a time until smooth. The sauce should be creamy and spreadable—never grainy.
What's the best way to store leftovers?
Keep in an airtight container in the fridge for up to 1 week. For longer storage, freeze in ice cube trays—thaw overnight in the fridge. The sauce actually tastes better after resting! If it thickens, stir in 1 tsp water or milk to restore creaminess. Label with the date for easy tracking.