Vegan Mushroom and onion sandwich

This mushroom and onion sandwich is super easy to make and is delicious. It is one of the recipes that you learn by heart and it always turns out delicious on days you are in a hurry or don't know what to eat for dinner or lunch.
Vegan mushroom and onion sanwhich

About the mushroom sandwich

Indulge in the exquisite flavors of our delectable vegan sandwich, generously stuffed with savory mushrooms and caramelized onions. Whether you’re seeking a quick lunch or a satisfying dinner option, this sandwich is your ultimate go-to choice.

Once you master the recipe, it will become an unforgettable culinary masterpiece that will consistently exceed your expectations. Treat yourself to this incredible dish and unlock a world of gastronomic delight!

If you’re a fan of the French Dip sandwich but prefer a vegan version without the broth, you can easily make one by omitting the broth. Personally, I don’t enjoy the texture of wet bread, so I skip the broth. However, if you don’t mind it, you can make a simple version with vegetable broth and soy sauce. Alternatively, you can enjoy it with an onion soup-style broth.

This vegan mushroom sandwich recipe packs a ton of flavor, making any extra sides unnecessary. Pair it with a tasty salad and enjoy a scrumptious lunch or dinner.

Ingredients to prepare a vegan and mushroom sandwich

Ingredients to make a vegan mushroom sandwich

Which Mushroom is best for this sandwich? I like this sandwich best by using a mix of several mushrooms; cremini, whites, and shiitake. You can use Portobello mushrooms, cremini, or white mushrooms. You can even use oyster mushrooms or make your mushroom mix.

Onion. Slice the onion thinly and evenly. This will help all onions caramelize evenly, and each bite tastes delicious.

Soy sauce, olive oil, and sliced garlic. If you don’t have garlic, you can use garlic powder.

French bread or baguette. It is also delicious if you make it with homemade bread.

Vegan smoked cheese. This is optional, but I feel it complements the sandwich pretty well. Use whatever vegan cheese you like the most. I used gouda from the Whole Foods brand. Make this nacho cheese recipe if you can’t get a good vegan cheese.

How to make a vegan mushroom sandwich?

It takes two simple steps:

  1. In a frying pan, add the olive oil, onions, and mushrooms with the garlic to caramelize until they become deliciously golden brown. Add the soy sauce to it.
  2. Put the mixture on a piece of French bread, put the cheese on top, and put it in the oven to melt. You can also grill the sandwich instead.
Mix of mushrooms, onion  and seasoning for a perfect mushroom sandwich.
Vegan mushroom and onion sandwich without cheese

Tips & tricks to make the best sandwich

  • Please eat the sandwiches immediately; if you leave them for a long time, the filling can make the bread soggy.
  • You can also add mustard, vegan mayo, pickles, jalapeños, avocado, lettuce, tomatoes, etc.
  • To melt the cheese and heat them, you can put them in the oven in the broiler function or put them in the toaster oven. I also love grilling the sandwiches.
  • If you will make them with loaf bread or slices of homemade bread, heat them on a griddle or frying pan with a bit of oil or vegan butter.
  • Serve with a simple vinaigrette salad or the raw broccoli apple salad.
Grabbing a halved vegan sandwich

Vegan mushroom and onion sandwich

Alejandra Graf
This mushroom and onion sandwich is super easy to make and is delicious. It is one of the recipes that you learn by heart and it always turns out delicious on days you are in a hurry or don’t know what to eat for dinner or lunch.
4 de 3 votos
Prep Time 10 minutes
Cook Time 20 minutes
0 minutes
Total Time 30 minutes
Course sandwich
Cuisine American
Servings 4 servings
Calories 228 kcal


  • 3 tablespoons olive oil
  • 32 oz mushrooms cremini, Portobello, or a mix
  • 1 large onion sliced
  • 2 cloves garlic sliced
  • 2 tablespoons soy sauce
  • pinch salt
  • freshly ground black pepper


  • 4 pieces French bread
  • 4 slices vegan cheese


  • In a frying pan put the olive oil and turn on the heat over medium heat, leave for a minute. Put the sliced ​​mushrooms, onion, and garlic and sauté for 5-7 minutes or until the onion is transparent and the mushrooms are well cooked.
  • Add the soy sauce, a pinch of salt, and black pepper to taste. Leave until all the liquid has been absorbed.
  • To prepare the sandwiches, cut the bread in the center without reaching the other side, fill it with the mushroom and onion mixture. Put a slice of cheese on top and put it in the oven or toaster oven to melt the cheese.


Calories: 228kcalCarbohydrates: 17gProtein: 9gFat: 16gSaturated Fat: 3gSodium: 721mgPotassium: 788mgFiber: 4gSugar: 6gVitamin A: 1IUVitamin C: 7mgCalcium: 32mgIron: 2mg
Keyword portobello, pulled vegan mushroom sandwich


Nutritional information of this recipe is only an estimate, the accuracy for any recipe on this site is not guaranteed.

Did you make this recipe?Tag @piloncilloyvainilla on Instagram and hashtag it #alecooks so we can all see your creations.
Alejandra Graf
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4 from 3 votes (3 ratings without comment)
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