Portobello Mushroom Burger

The delicious portobello mushroom burger
The delicious portabello mushroom burger

Let’s begin with an astonishing mushroom fact that I recently learned. As legend has it, the “portobello” is basically an over-grown brown “crimini” mushroom. In fact, it’s not even originating from Italy as one might think. Turns out, these delicious large brown mushrooms are simply the large, over-grown version of the crimini mushroom. Astonishingly, the portobello is just a marketing ploy that the American’s began in the early 1990’s. However in Italy, the large overgrown ‘crimini’ is called “cappellone”. Simply put…big hat!

What makes a crimini a portobello? Size. The size must reach 4 to 6″ in diameter. With the obvious ‘size’, comes the meaty texture, or flesh of the mushroom that allows it to be perfect for a burger! These large, yet delicate ‘big hat’ mushrooms can be served whole on the burger, or sliced in half. Size wise and taste wise, it’s an obvious contender to the meat burger.

As a vegan, my vote has been cast. The portobello mushroom burger delivers a huge level of taste, texture and a wonderful dining experience. With the exception of the mushroom, nothing has to die here for this dish. I’m sorry, dear mushroom friend, but sometimes there must be a sacrifice made with out blood. Your particular sacrifice provided a wonderful meal, and for that I thank you!

Availability is not always easy

sitting in marinade

Unfortunately, portobello’s aren’t so easy to find in my area. Being that they are just over-grown crimini mushrooms, I’m assuming the reason to be a matter of low demand. All I can say is try these burgers, then watch the demand sky rocket! What started in the 1990’s as a marketing scheme in America, has evolved into a 30+ million dollar a year industry. I’d say the trend is catching on…

fresh rosemary

A delicious marinade is key

Just as with any meat burger, or meat grill, the marinade and pre-work of flavoring the meat is just as important with the portobello mushroom burger. I happen to know that balsamic vinegar, garlic and rosemary are great ‘woody’ flavors that compliment the mushroom. Let the large caps marinade for up to 30 minutes. Be sure to turn them over half way through the marinade. Thus allowing the balsamic herby flavors to be absorbed. Use a brush to really paint the marinade on the inside of the mushrooms.

flipped during marinade

Portobello Mushroom Burger

A delicious burger indeed! This is loaded with flavor and good vibes. Be sure to spread some vegan mayonaise all over this burger before you bite into it! It's delicious!
Course Main Course
Cuisine American
Keyword burger, vegan
Prep Time 30 minutes
Cook Time 15 minutes
Total Time 45 minutes
Servings 4 people


  • 4 large portobello mushrooms don't wash, just wipe down with a wet cloth.
  • 1/4 cup balsamic vinegar
  • 1 TBS soy sauce
  • 2 TBS fresh rosemary whole or chopped
  • 1-2 cloves garlic pressed
  • 1 pinch salt and pepper
  • 4 large burger buns heated in the oven for crispness
  • additional burger toppings lettuce, onions, avocado, tomato


  • in a large baking dish, add your liquid marinade, then put the mushrooms in. Paint the above side with the marinade.
  • Add more rosemary if desired, and let marinade on one side for about 15 minutes or more.
  • flip sides, and be sure to paint more marinade on the exposed or above side
    after about 30 minutes, put baking dish with marinade and mushrooms in the oven @ 200 Celsius. Bake for about 7 min on each side, brushing the marinade in between the turn.
  • take out and pair with your burger bun
  • Build your burger and enjoy!
    The delicious portabello mushroom burger

Permanent link to this article: https://www.teawea.com/portobello-mushroom-burger/


    • joanne lenzi on 22/05/2020 at 07:35
    • Reply

    i have made these before but with just olive oil and rosemary as a marinade, i will have to try this. looks yummy!!

    1. Hello,
      Thanks for the feedback Joanne. I agree. Olive oil would be a nice addition, but at the moment, I’m cooking with out olive oil. Oddly enough, you don’t miss it as much as you think. Give it a whirl w/ the vinegar, herbs and garlic. Yummy, fast and memorable.
      Thanks again for commenting~!
      Happy Cooking.

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