This Copycat Arby’s Beef and Cheddar Recipe features warm deli-style roast beef, melty cheddar cheese sauce, and a homemade red sauce on a toasted onion bun. A quick and delicious homemade version of the classic Arby’s favorite!
In a small saucepan, whisk together all of the sauce ingredients.
Cook over medium-high heat for 5–7 minutes, stirring frequently, until the sauce is combined and thickened.
Remove from the heat and let cool slightly while preparing the sandwiches.
Heat the beef broth in a saucepan over medium heat until warmed through.
Add the roast beef to the broth one slice at a time. Let each slice warm in the broth for a few minutes, then remove it from the pan. Repeat until all of the roast beef is heated through.
Heat the nacho cheese sauce in the microwave in 20-second intervals until warm, or prepare the homemade cheese sauce if using.
Divide the warmed roast beef evenly among the onion hamburger buns.
Top each sandwich with the warm nacho cheese sauce and prepared sauce.
Serve warm.
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Notes
Watch the sauce as it cooks. If it gets too thick, thin it out with a small amount of water until it’s the consistency that you prefer. If the sauce does not get thick enough, continue to cook on medium heat until it thickens. You can use store bought sauce instead of making your own if you prefer. I heat up the roast beef slices one at a time but if you use more broth and a bigger pan, you can heat up all the slices at once if you prefer. You can easily serve without the cheese sauce to make a regular Arby’s roast beef sandwich as well. Heat up the buns before assembling if you prefer but they are great as is as well.