Vegan Arby’s Roast Beef and Cheddar Recipe

Some of Arby’s meals are extra savory and delicious, but they’re packed with meat, calories, fat, and carbs. Wouldn’t it be nice if you could enjoy a filling satisfying meal without worrying about all of that? Vegan and vegetarian copycat recipes are gaining popularity, and it seems like there are always new ways to mimic the flavors while eating healthy. I’ll admit I was surprised to find out there is a Vegan Arby’s Roast Beef and Cheddar recipe because a roast beef sandwich is generally packed full of roast beef- so how could it be replicated without using meat?

We found an excellent recipe that calls for seitan, a vegan meat substitute made entirely out of hydrated gluten. It can also be called wheat gluten, wheat meat, wheat protein, or just gluten. The horsey sauce is made using tofu, spicy horseradish, and vegan mayo, and it’s tasty enough to pour on your sandwich or even to dip your fries into. Saute and carmelize sliced onions for about 25 minutes and set them aside until you’re ready to assemble your sandwich. Melt a slice of vegan cheese and put it all into a vegan bun to complete the sandwich. Serve warm and enjoy.

Vegan Arby's Roast Beef and Cheddar Recipe

Cook Time 1 hr
Servings 4


Horseradish Cream Sauce

  • 1/2 cup silkin tofu
  • 1/2 cup vegan mayo
  • 2 tsp lemon juice
  • 1/4 cup spicy prepared horseradish
  • pinch of salt
  • fresh cracked pepper

Vegan "Brisket"

  • 1/2 yellow onion, thinly sliced
  • 2 8-oz packages sliced seitan, or homemade seitan thinly sliced 
  • 2 tbsp Vegan Dried French Onion Dip Mix
  • 2 tsp vegan Worcestershire sauce
  • 1-2 tbsp water
  • pinch of salt
  • 2 tbsp cooking oil + more if needed

For the Sandwich

  • 4 soft vegan buns
  • 4 slices vegan cheddar or provolone


  • To prepare the sauce, combine the tofu, mayo, and lemon juice in a blender and blend until it's smooth. Transfer it to a bowl with a lid, and stir in horseradish, salt to taste, and pepper. Close the container, and refrigerate until needed.
  • Next, heat a large skillet over medium heat. Add the sliced onion, 1 tbsp of oil and a large pinch of salt. Cook the onions down for 25-30 minutes, until they’re nice and caramelized, stirring frequently to prevent burning.
  • Once onions are done, transfer them to a plate and set aside. Add another tbsp or 2 of cooking oil and add the seitan. Saute for 2-3 minutes until it's warm. Add in the French onion dip mix, Worcestershire sauce, and water. Stir until all of the pieces are coated in flavoring. Then add the onion in with the seitan.
  • Load your sandwiches up with horseradish cream sauce, seitan, onions, and cheese. Microwave the cheese for 10 seconds or heat it up in a pan with a bit of water if you like it melty! Serve warm and enjoy.


  • If you can't find sliced seitan, any shape will work.
  • Lipton's Dried French Onion Dip Mix is vegan.

Vegan fast-food options are a growing trend, and we don’t see them going away any time soon. Be sure to check out our post on where to get the best vegan fast-food items for more inspiration.

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