Thick, juicy, tender, and hearty, these are the ribeyes of veggie burgers! Grilled or baked in the oven, you can’t go wrong with a vegan Portobello Mushroom Burger.

We love Portobello burgers because they’re…
- Perfect for grilling or the oven
- Vegan ribeyes
- Hearty & filling
- Best vegan burgers
- Wholesome
- Packed with flavor
- Delicious
Mushroom lovers enjoy the Portobello in stir-fries, casseroles, soups, and salads. Another hearty preparation style is to give them solo status on a whole grain bun as a meatless burger with traditional condiments like lettuce, pickles, and tomatoes.

How to make Portobello mushroom burgers
Start with large Portobellos that are the right size for serving on a bun.
Wash the mushrooms and pat them dry.
If the stems in the middle are large, I like to shorten them using a knife to gently trim them down.

Making the marinade
Place all the mushroom marinade ingredients in a small bowl and whisk together. They include soy sauce, vegan Worcestershire sauce, lemon juice, water, minced garlic, and spices.
The full ingredient list with measurements can be found in the recipe card at the bottom of this page.

Drizzle the marinade over mushrooms. Cover and place in the refrigerator to marinate for at least 30 minutes or overnight.
The longer they are marinated, the more flavor these burgers will have.

Baking portobello mushrooms
Normally, I go ahead and put the mushroom caps in my baking pan to marinate in the refrigerator. It just makes things easier to simply pull out and place in the oven.
When ready to cook preheat oven to 350°F.
Place the marinated mushrooms in a baking pan lined with parchment paper to prevent sticking and to make for easy cleanup. Or you can use non-stick silicone baking mats.
Bake in the oven for approximately 25-30 minutes.
Mushrooms release their water while baking so, when they are done, drain the water or use a paper towel to blot away the excess liquid.

Grilling portobello mushrooms
If grilling, use low heat. Allow to cook for approximately 20-30 minutes turning them over about halfway through the cooking process.
I like to close the lid to help them to cook uniformly. Reduce or increase grill temperature as needed.
Serve on whole-grain buns with grilled onions, lettuce, and favorite toppings. A great addition is my Homemade Vegan Mayonnaise.

*Originally published March 2015.
Plant-based grilling
Who says herbivores don’t need a grill?! We love grilling all-year-round because it’s easy, delicious, and clean up is a breeze! Check out this other Plant-Based Grilling Ideas. These grilled portobellos are included in the list.
Other plant-based burger recipes

Best Portobello Mushroom Burger
Thick, juicy, tender, and hearty, these are the ribeyes of veggie burgers! Grilled or baked in the oven, you can't go wrong with Portobello mushroom burgers.
Ingredients
- 4 large Portobello mushrooms
- 1 Tbsp worcestershire sauce, (read label and avoid anchovies)
- 2 Tbsp soy sauce
- 1 Tbsp lemon juice
- 2 Tbsp water
- 1 Tbsp minced garlic
- 1/2 tsp garlic powder
- 1/2 tsp onion powder
- 1/8 tsp season salt
Instructions
- Wash large mushrooms, pat dry, and place in large bowl or baking dish.
- If the stems in the middle are large, I like to shorten them using a knife to gently trim them down.
- Place all other ingredients in a small bowl and whisk together. Drizzle over the mushrooms.
- Cover and place in the refrigerator to marinate for at least 30 minutes or overnight.
- Normally, I go ahead and put the mushroom caps in my baking pan to marinate in the refrigerator. It just makes things easier to simply pull out and place in the oven.
- When ready to cook preheat oven to 350°F.
- Place the marinated mushrooms in a baking pan lined with parchment paper to prevent sticking and to make for easy cleanup. Or you can use non-stick silicone baking mats.
- Bake in the oven for approximately 25-30 minutes.
- Mushrooms release their water while baking so, when they are done, drain the water or use a paper towel to blot away the excess liquid.
- If grilling, use low heat. Allow to cook for approximately 30 minutes.
- Serve on whole-grain buns with grilled onions, lettuce, and favorite toppings.
Notes
Detailed instructions, in-process photos, and my personal helpful tips can be found in the article above.
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Nutrition Information:
Yield: 4Amount Per Serving: Calories: 29Total Fat: 0gCholesterol: 0mgCarbohydrates: 6gFiber: 1gSugar: 2gProtein: 2g
To obtain the most accurate representation of the nutritional information in a given recipe, you should calculate the nutritional information with the actual ingredients used in your recipe, using your preferred nutrition calculator. You are solely responsible for ensuring that any nutritional information provided is accurate, complete, and useful.
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Antoinette
Friday 21st of February 2020
Hi, Terri,
I loved your portobello mushrooms! So good!! I love your recipes, thank you for everything you do!!
Antoinette
mairby
Friday 9th of August 2019
Happy Herbivore has a homemade Worcestershire
Terri Edwards
Friday 9th of August 2019
Really? That's great, and I'm going to check that out. Thanks for letting me know!
Brenda
Sunday 8th of July 2018
Best recipe of any we've tried for Portobello Mushroom Burgers!
I would love to win the copy of How Not to Die so that I could gift it to my son and daughter-in-law ;-)
Brenda
Friday 28th of April 2017
I have a question for you Terri...when do you marinate the mushrooms? Do you bake/grill them for 10 minutes, drizzle with the Worcestershire sauce mixture and THEN marinate (for however long) before baking/grilling again? OR, do you marinate them BEFORE you do any of the baking/grilling?
I made them the other night (first time I've ever bought and used portobello mushrooms) but marinated the before anything else and I don't think the full flavor came through...but, will definitely make them again!
EatPlant-Based.com
Friday 28th of April 2017
I marinate them before doing anything else. The longer you can let them marinate, the better. I haven't had these in awhile. I think it's about time. Thanks for the reminder! :)
carmen
Wednesday 11th of March 2015
I've made these twice now Terri! Absolutely delicious!! One of our favourites, although we haven't used Worcestershire sauce because I didn't know that there were some without anchovies. Good to know. :-)
Thank you! ♥ carmen
Terri
Thursday 12th of March 2015
Yay! I'm so glad you liked them! Thanks for letting me know. :)