
This Copycat Arbys Beef and Cheddar sandwich captures all the nostalgia of the classic fast food favorite using easy pantry ingredients and simple techniques. Thinly sliced roast beef is gently warmed in savory broth, then piled onto a soft onion bun and smothered in a homemade cheese sauce and zesty Arbys-inspired sauce. No drive-thru needed for this delicious comfort food fix.
I first whipped this up for a backyard movie night and it instantly became a request for every birthday and football party. The homemade sauce really sends it over the top and the extra cheese sauce never lasts long.
Ingredients
- Ketchup: gives the signature tangy tomato base to the special Arbys sauce opt for a brand without corn syrup for best flavor
- Light brown sugar: balances tartness with a mellow sweetness finely packed for measuring accuracy
- Apple cider vinegar: sharpens the sauce with bright acidity use an unfiltered type for more depth
- Worcestershire sauce: adds that savory umami hit a small splash makes all the difference
- Garlic powder and onion powder: round out the flavors go for a fresh jar to keep the spices vibrant
- Unsalted butter: is the base for the cheese sauce pick a high quality stick for creamy results
- All purpose flour: thickens the cheese sauce use one with a neutral flavor
- Whole milk: keeps the cheese sauce luscious skip low fat for richness
- Sharp cheddar cheese: brings sharp tang and a melty finish shred your own block for smoothest sauce
- Low sodium beef broth: is used to gently warm the roast beef keeping salt in check choose a robust broth for better flavor
- Deli roast beef: should be thinly sliced and fresh from the deli counter look for visible marbling
- Onion hamburger buns: have a touch of sweet and savory flavor for that classic Arbys style look for fresh bakery buns for best texture
Step-by-Step Instructions
- Make the Arbys Sauce:
- In a small mixing bowl combine ketchup brown sugar apple cider vinegar Worcestershire sauce garlic powder and onion powder Whisk until smooth and set aside so flavors meld
- Prepare the Cheese Sauce:
- In a small saucepan over medium heat melt the butter until just foaming Stir in the flour and cook while stirring constantly for one minute to remove any raw flour taste Slowly pour in the milk a little at a time whisking constantly to avoid lumps Once all the milk is in bring the mixture to a gentle simmer whisk and let it bubble for about five minutes until thickened Take the pot off the heat and stir in the shredded cheddar until fully melted and glossy Set aside and keep warm
- Warm the Roast Beef:
- In a large skillet set over medium heat add the beef broth and let it reach a simmer for about five minutes Separate the slices of roast beef and add them to the broth one at a time This helps each piece soak up flavor and keeps them from clumping Allow the beef to heat for one to two minutes just until warmed through
- Assemble the Sandwiches:
- Lay out the onion buns and spread a generous layer of homemade Arbys sauce on the bottom half Top with a pile of warm roast beef Spoon the hot cheese sauce lavishly over the meat Cap with the top bun and serve straight away while gooey and melty

The sharp cheddar cheese is always my favorite part Every time I make this sandwich my kids want extra cheese sauce for dipping curly fries or even their veggies The gooey drips are a big part of the fun and bring back so many laughs from family camping trips
Storage Tips
This sandwich is best enjoyed fresh but you can store leftover roast beef and sauce separately in the fridge for up to two days. Reheat cheese sauce gently over low heat stirring constantly to avoid separation. Do not freeze the assembled sandwich as the bun will get soggy and the cheese sauce may break.
Ingredient Substitutions
If you do not have onion buns plain hamburger buns or brioche buns work just fine though you will lose that distinct Arbys flavor. Swiss cheese or mild cheddar can replace sharp cheddar for a milder sauce. Homemade roast beef is fantastic but any thinly sliced deli roast beef works. In a pinch yellow mustard mixed with a little extra brown sugar and vinegar can stand in for the Arbys sauce.
Serving Suggestions
Serve these sandwiches with a side of curly fries mozzarella sticks or crispy pickles for a true fast food experience. Cut into halves or quarters for party platters. This sandwich pairs well with coleslaw a crisp apple salad or any tangy side to refresh your palate.

Cultural and Historical Context
The Arbys Beef and Cheddar sandwich is a fast food icon known for its sweet tangy sauce and signature cheese. It was designed as an upgrade to the classic roast beef sandwich giving fans more flavor and cheesy richness. Home cooks have long recreated it during football games and backyard parties lending a sense of nostalgia and fun to gatherings.
Recipe FAQs
- → How do I keep the roast beef tender?
Warm the thinly sliced roast beef gently in simmering beef broth for just 1-2 minutes. This ensures juicy, flavorful meat without overcooking.
- → Can I substitute the cheddar cheese?
Sharp cheddar offers authentic flavor, but mild cheddar, Colby, or even American cheese can be used for a milder, smoother cheese sauce.
- → What's the best way to serve the sandwich?
Assemble right before serving on toasted onion buns with warm cheese sauce. Pair with curly fries or mozzarella sticks for a classic touch.
- → Are there tips for making the cheese sauce smooth?
Whisk constantly when adding milk to the roux, and remove from heat before stirring in cheese to avoid clumping or breaking.
- → Is it possible to prepare anything ahead of time?
The homemade sauce can be mixed in advance, but assemble the sandwiches just before serving so the cheese sauce stays creamy and smooth.
- → Which buns work best for this sandwich?
Onion hamburger buns are ideal, but classic sandwich rolls or Kaiser buns also complement the beef and cheddar flavors.