Sauces & Condiments
This Arby's roast beef sauce recipe captures the signature tangy-sweet balance that makes their sandwiches legendary. The secret lies in blending creamy mayo with sharp horseradish and vinegar for that signature kick, while a touch of sugar and spices adds depth.
I've perfected this version after years of recreating the restaurant experience at home—it's closer than any store-bought substitute.
The magic happens in the ratio of ingredients—just enough mustard for tang, horseradish for heat, and a hint of sugar to balance the acidity. What makes this sauce special is how it transforms simple roast beef sandwiches into something restaurant-quality.
The texture is smooth yet clings perfectly to meat, keeping every bite flavorful without overwhelming the beef's natural taste.
This sauce isn't just for sandwiches—it elevates grilled meats, burgers, or even as a dip for fries. The blend stays fresh in the fridge for up to two weeks, making it perfect for meal prep.
Once you taste the difference between homemade and bottled, you'll never go back to the store version again.
For best results, let the sauce sit for 30 minutes before serving to allow flavors to meld completely. The combination of creamy, tangy, and slightly sweet creates that perfect balance that makes Arby's sauce so addictive. Let's make this sauce that'll have everyone asking for seconds.
Ingredients for arby's roast beef sandwich sauce
Seven ingredients blend into this iconic sauce that'll make your sandwiches legendary.
| Ingredient | Amount | Notes |
|---|---|---|
| Mayonnaise 🥫 | ¾ cup | High-quality, creamy mayo preferred |
| Horseradish Cream 🌶️ | ½ cup | Prepared horseradish or fresh grated |
| Ketchup 🍅 | ¼ cup | Heinz or similar classic brand |
| Yellow Mustard 🟡 | 2 tbsp | Dijon or American-style preferred |
| White Vinegar 💧 | 1 tbsp | White or apple cider vinegar |
| Granulated Sugar 🍚 | 1 tbsp | White or light brown sugar |
| Onion Powder 🧅 | ½ tsp | For subtle depth of flavor |
| Ground Black Pepper 🌶️ | ¼ tsp | Freshly ground for best flavor |
| Garlic Powder 🧄 | ½ tsp | Adds subtle savory depth |
| Barbecue Sauce 🔥 | 1 tbsp | Sweet or smoky variety for hidden depth |
The mayo is the base—Duke's or Hellmann's are my go-tos for that perfect creamy texture. Horseradish is non-negotiable here; prepared horseradish from the jar works, but fresh grated adds an extra layer of punch. Grab the Heinz ketchup—it's got that classic tang that's hard to replicate. The mustard? Dijon adds sophistication, but American-style works too if that's what you've got. For the vinegar, white is traditional, but apple cider adds a subtle sweetness that some people swear by. The sugar balances everything—don't skip it, even if it seems small.
No horseradish? Extra hot sauce at half the amount gets you close, though it won't be exactly the same. Short on barbecue sauce? Skip it—this recipe works without it, but it adds that hidden depth that makes it restaurant-quality. The onion and garlic powders are subtle but essential—Diamond Crystal kosher salt is perfect for these dry spices if you want to be precise. Want to make a big batch? Double everything, but taste as you go—sometimes the sugar needs adjusting based on your ketchup's sweetness. This sauce is all about balance, so don't be afraid to tweak!
This sauce keeps for 2 weeks in the fridge, sealed tightly in a jar. The flavors actually get better after sitting for a day—let it rest 24 hours before using for maximum impact. For meal prep, divide into small containers so you always have sauce ready. Freezes beautifully for up to 3 months if you want to stock up. Pro tip: shake before using—it settles over time, and you want that perfect consistency every time.
Why You'll Love This Recipe
- Five-Ingredient Magic: I swear, this sauce is the kind of recipe where you’ll stare at the pantry and think, "I already have all this?" The mix of creamy mayo, tangy horseradish, and that just-right kick from vinegar comes together in minutes—no fancy techniques, just stirring.
- Tangy Kick: That horseradish cream isn’t just for show—it’s the star. The heat cuts through the richness of the mayo, while the vinegar brightens everything up. Honestly? It’s the kind of flavor that makes you want to slather it on everything, not just sandwiches.
- Game for Any Meal: Between us, this sauce is my secret weapon for quick lunches, game-day snacks, or even a fancy charcuterie board. It’s bold enough for a roast beef sandwich but mellow enough to drizzle on fries or mix into deviled eggs. (Yes, even on a Tuesday night.)
- Stays Fresh Forever: Make a big batch—it keeps for weeks in the fridge without separating or losing its punch. I’ll be real: I’ve had it last three months in my fridge, and it’s still better than store-bought. Plus, it’s cheap—you’re basically making gourmet sauce for pennies.
Step-by-step instructions for Arby's-inspired roast beef sauce
This tangy, creamy sauce delivers that signature Arby's kick with a perfect balance of heat, sweetness, and smoky depth.
Whisk Together the Creamy Base
In a medium bowl, combine the 0.75 cup mayonnaise and 0.5 cup horseradish cream using a whisk or silicone spatula. Stir until fully blended and smooth—this creates the rich, velvety foundation. I like to use a fork first to break up any lumps, then switch to a whisk for even distribution. The horseradish cream adds that signature sharpness, so don't skip this step.
Next, add the 0.25 cup ketchup and 2 tbsp yellow mustard, mixing until completely incorporated. The ketchup provides sweetness while the mustard adds tang. Stir vigorously for about 30 seconds to ensure everything is well combined and no streaks remain. This is where the sauce starts coming together—you'll see it transform from separate ingredients into a cohesive mixture.
Balance Flavors with Vinegar and Sugar
Pour in the 1 tbsp white vinegar and 1 tbsp granulated sugar, whisking continuously. The vinegar brightens the sauce while the sugar rounds out the sharpness. Taste as you go—this is your flavor checkpoint. You should notice the sauce becoming more balanced, with a slight tang and sweetness working together. If it tastes too sharp, add a pinch more sugar; if it's too sweet, add a splash more vinegar.
Now sprinkle in the 0.5 tsp onion powder, 0.5 tsp garlic powder, and 0.25 tsp ground black pepper. Whisk until all the spices are evenly distributed. These dry ingredients add subtle depth that elevates the sauce from basic to restaurant-quality. The onion and garlic powders infuse warmth, while the black pepper adds a hint of spice that complements the horseradish.
Add the Secret BBQ Depth
Finally, stir in the 1 tbsp barbecue sauce. This is the hidden ingredient that gives the sauce its signature complexity. The smoky, slightly sweet notes of the barbecue sauce blend seamlessly with the tangy horseradish and creamy mayo. Mix well until fully incorporated—you're aiming for a smooth, cohesive texture with no visible streaks of barbecue sauce.
Taste again and adjust seasoning if needed. The sauce should be bold, tangy, and slightly sweet with a hint of heat from the horseradish and a smoky undertone. If it needs more depth, add a pinch more onion or garlic powder. If it's too thick, thin it with 1-2 tsp water or apple cider vinegar until it reaches a pourable yet spreadable consistency—similar to Arby's signature sauce.
Let It Rest and Serve
Cover the bowl and refrigerate the sauce for at least 30 minutes before serving. This resting period allows the flavors to meld and the sauce to thicken slightly, making it easier to spread without dripping. The longer it sits, the better the flavors develop—up to 24 hours if you're making it ahead of time.
When ready to use, give the sauce a final stir to ensure everything is well combined. The texture should be smooth and creamy, with a slight sheen that indicates it's ready to spread. Serve immediately on your favorite roast beef sandwich, slathered generously between the slices. The sauce should complement the beef perfectly, adding a tangy, creamy kick that makes every bite unforgettable.
Pro Tips For Making Arby'S Roast Beef Sandwich Sauce
- Mix Horseradish Last: Mix the horseradish cream into the sauce after combining everything else—about 10 minutes before serving. Adding it early makes the heat fade too fast, and you’ll end up with a milder, less vibrant kick. I learned this the hard way when my sauce lost its punch after sitting too long.
- Use Real Horseradish Cream: Skip the powdered horseradish—it’s a game-changer. Real horseradish cream (like Gourmet Garden) has the right balance of sharpness and creaminess without the grit. If you’re in a pinch, mix a teaspoon of prepared horseradish with mayo, but it won’t be the same.
- Balance the Vinegar Slowly: Add the white vinegar one teaspoon at a time, tasting as you go. Too much and the sauce turns sour; too little and it’s flat. Start with 1 tsp, let it sit 5 minutes, then adjust. I’ve ruined batches by dumping it all in at once—don’t be impatient.
- Chill Before Serving: Let the sauce sit in the fridge for at least 30 minutes after mixing. The flavors meld better when cool, and the horseradish’s heat mellows into something smooth. I used to serve it right away, and it always tasted disjointed—now it’s the thing that makes my sandwiches taste like Arby’s.
Pro cooking tips for this recipe
Emulsion Perfection
The key to this sauce’s velvety texture lies in proper emulsification—whisking the mayo and horseradish cream until completely smooth before adding other ingredients. I use a silicon spatula first to break up any lumps, then switch to a whisk for 30 seconds to ensure no streaks remain.
The goal is a uniform, lump-free base—this prevents separation later. If your sauce looks streaky, add 1 tsp water and whisk again. 🥫
Horseradish Mastery
Horseradish is the soul of this sauce, but it’s easy to overdo it. Start with ½ cup prepared horseradish cream (like Gourmet Garden), then taste before adding more. Fresh horseradish? Grate 1 tbsp and let it sit for 5 minutes to mellow its heat.
If the sauce tastes too sharp, balance it with ½ tsp extra sugar. Pro tip: Store horseradish in the freezer to preserve its potency. 🌶️
BBQ Sauce Hack
The 1 tbsp barbecue sauce is non-negotiable for that Arby’s depth, but not all BBQ sauces work. I recommend Sweet Baby Ray’s or Stubb’s Original—their sweetness and smokiness blend perfectly.
For a homemade shortcut, mix 1 tsp molasses + ½ tsp smoked paprika + ½ tsp liquid smoke as a substitute. Stir it in last to avoid overpowering the tangy base. 🔥
Thickness Control
This sauce should be spreadable but not runny. If it’s too thick after mixing, thin with 1 tsp apple cider vinegar (it adds brightness too!). Too thin? Let it sit uncovered in the fridge for 15 minutes to thicken naturally.
For meal prep, store in a glass jar—it’ll hold its shape better than plastic. Always shake before serving to redistribute settled ingredients. ⚡
Flavor Boosting
Want extra depth? Add ½ tsp Worcestershire sauce for umami or ¼ tsp celery seed for a subtle herbal note. For heat lovers, swap 1 tsp of the mustard for hot sauce (like Frank’s RedHot).
Taste as you go—this sauce is all about balance, so adjust gradually. The 30-minute rest is crucial; flavors meld like a fine wine. 💫
Storage Secrets
This sauce keeps for 2 weeks in the fridge, but freeze it for 3 months by spooning into silicone ice cube trays (perfect for single-serving portions!). Thaw overnight in the fridge—never microwave, as it ruins the emulsion.
For long-term storage, add ½ tsp lemon juice to the jar before sealing to preserve freshness. Always stir before using—settled ingredients separate over time. ❄️
Nutrition facts
Frequently asked questions
Can I make this sauce without horseradish?
Yes, but it won't taste exactly like Arby's! Replace the ½ cup horseradish cream with ¼ cup prepared mustard plus 1 tbsp hot sauce (like Frank's RedHot). The heat will be milder, but you'll still get that signature tang. For extra depth, add ½ tsp celery salt to mimic horseradish's complexity.
How do I fix a sauce that's too thick or too thin?
For thick sauce, thin with ½ tsp apple cider vinegar or water at a time, whisking well. For thin sauce, let it sit uncovered in the fridge for 15-20 minutes—the moisture will evaporate slightly. If it's still too runny, whisk in 1 tsp cornstarch mixed with 1 tsp water until smooth. Always adjust gradually!
What's the best way to store homemade sauce?
Store in an airtight glass jar in the fridge for up to 2 weeks. For long-term storage, freeze in silicone ice cube trays (perfect for sandwich portions) for 3 months. Thaw overnight in the fridge—never microwave, as it breaks the emulsion. Add ½ tsp lemon juice before sealing to preserve freshness longer.
Can I use this sauce for other foods besides sandwiches?
This versatile sauce elevates burgers, grilled chicken, fries, or even as a dip for veggie sticks. Try it on pulled pork sandwiches or as a glaze for roasted potatoes. The creamy tang pairs perfectly with spicy foods to balance heat. Just adjust seasoning slightly for different applications.
Why does my sauce separate after refrigerating?
Separation happens when the emulsion breaks, usually from not whisking enough or temperature changes. Fix it by whisking vigorously for 1-2 minutes until smooth. For prevention, whisk continuously for 30 seconds after adding each ingredient, and store in the coldest part of your fridge. If it happens often, use mayonnaise with a higher oil content for better stability.