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Roast beef sandwich with cheese on a cutting board.

Roast Beef Sandwich

Teri & Jenny
Our Roast Beef Sandwich Recipe is inspired by Arby's roast beef and cheddar sandwiches! They're piled high with thin slices of our Homemade Roast Beef, then smothered in our super decadent cheddar cheese sauce and finished between a soft sesame bun.
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Prep Time 5 mins
Cook Time 10 mins
Total Time 15 mins
Course dinner, lunch, Main Course
Cuisine Amercian
Servings 3


cheddar cheese sauce

  • 3 tablespoons unsalted butter
  • 2 1/2 tablespoons all purpose flour
  • 1 1/4 cups milk
  • 1 1/2 teaspoons dijon mustard
  • 1/2 teaspoon salt
  • 6 ounces shredded sharp cheddar cheese



cheddar cheese sauce

  • Place a pot over medium heat and melt butter.
  • Once butter has melted, add flour and whisk until no lumps remain.
  • Whisk milk, mustard and salt into mixture and continue to whisk together until mixture is smooth and no lumps remain, and mixture has slightly thickened.
  • Remove mixture from heat and stir in grated cheese, small handfuls at a time, until all cheese has been added and cheese sauce is smooth.


  • Stack a third of the roast beef onto the bottom bun of each burger. Pour a generous amount of cheese sauce over each sandwich and gently press bun tops onto each sandwich. Serve immediately.


Variations for our Roast Beef Sandwich Recipe

  • We use a simple sesame bun for our sandwich recipe, but you can go a fancier route by using brioche burger buns or something like everyone's favorite potato burger buns.
  • We also kept our roast beef sandwich simple, like the Arby's one, but it's also delicious loaded with lettuce, sliced tomatoes and sliced red onions, so feel free to load it up with your favorite sandwich fixings if that's what you prefer!
Keyword Arby's inspired, beef and cheddar, beef sandwich
Tried this recipe?Let us know how it was!