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Arby's-Inspired Loaded Roast Beef Sandwiches with melted cheddar cheese and crispy onions
Tiffany

Arby's-Inspired Loaded Roast Beef Sandwiches

These Arby's-Inspired Loaded Roast Beef Sandwiches feature tender roast beef, melted cheddar, crispy onions, and a creamy homemade sauce on toasted sesame buns. An easy, satisfying meal ready in about 25 minutes.
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Prep Time 15 minutes
Cook Time 10 minutes
Total Time 15 minutes
Servings: 4 sandwiches
Course: Lunch, Dinner, Main Course
Cuisine: American
Ingredients Equipment Method Notes

Ingredients
  

For the Sandwiches
  • 1 lb thinly sliced cooked deli roast beef
  • 4 sesame seed sandwich buns
  • 4 slices sharp cheddar cheese
  • 1/2 cup crispy fried onions
  • 1/2 cup low-sodium beef broth
  • 2 tbsp unsalted butter softened
For the Homemade Sandwich Sauce
  • 1/4 cup mayonnaise
  • 2 tbsp ketchup
  • 1 tsp Dijon mustard
  • 1/2 tsp smoked paprika
  • 1/2 tsp garlic powder
  • 1 tsp apple cider vinegar
  • 1 tsp brown sugar optional
  • 1 pinch freshly ground black pepper

Equipment

  • Large skillet with lid
  • Small mixing bowl
  • Whisk
  • Spatula
  • Measuring cups and spoons

Method
 

  1. Make the Sauce: In a small bowl, whisk together mayonnaise, ketchup, Dijon mustard, smoked paprika, garlic powder, apple cider vinegar, optional brown sugar, and black pepper until smooth.
  2. Toast the Buns: Spread softened butter over the cut sides of the sesame buns. Toast in a skillet over medium heat for 1–2 minutes until lightly golden.
  3. Warm the Roast Beef: Add beef broth to the skillet and bring to a gentle simmer. Add the cooked roast beef and warm gently until thoroughly heated.
  4. Melt the Cheese: Divide the warm roast beef into four portions. Place one slice of cheddar over each portion. Cover briefly over low heat until the cheese melts.
  5. Assemble the Sandwiches: Spread sauce over the toasted bun bottoms. Add the cheesy roast beef and crispy fried onions. Drizzle with extra sauce if desired.
  6. Serve: Place the top buns over the fillings and serve immediately while warm.

Notes

Recipe Tips
  • Use thinly sliced, fully cooked deli roast beef for the best texture.
  • Warm the roast beef gently in beef broth to help keep it tender.
  • Toast the buns before assembling to prevent sogginess.
  • Add crispy fried onions just before serving.
  • Substitute warm cheddar cheese sauce for sliced cheddar if preferred.
Make Ahead: Prepare the sandwich sauce in advance and refrigerate it until needed.
Storage: Refrigerate the components separately. Follow the roast beef package's storage instructions.
Reheating: Warm the roast beef until steaming hot and assemble the sandwiches with freshly toasted buns.
Serving Suggestion: Serve with French fries, potato wedges, coleslaw, or dill pickles.