Portobello Mushroom Burgers



These Portobello Mushroom Burgers are absolutely bursting with flavour! With a simple 4 ingredient marinade, these are sure to be some of the best veggie burgers youve ever had!

It wasnt too long ago I uploaded myBeetroot Burgerwhich went down an absolute treat! So, I thought Id come back with another veggie burger for you.

Lets welcome to the party our good friend Portobello Mushroom.

Portobello mushrooms make perfect burgers for a couple of reasons. Firstly, theyre big and juicy. I dont know about you, but when someone says mushroom burger I always think it better be a darn big mushroom otherwise this aint gonna work.Portobellos can hold their own in a bun, trust me.

Second is that they take on flavour so well. Lets welcome a few more friends to the party

Portobello Mushroom Marinade

  • Balsamic Vinegar
  • Soy Sauce
  • Worcestershire Sauce
  • Garlic
  • Olive Oil
  • Salt & Pepper

The combination of balsamic vinegar and soy sauce works wonders on so many things, not just including burgers. Its something I learnt from Icelands head chef at an event and have used it on some many things when grilling. Most famously my Mexican Chicken Burger!

With the addition of Worcestershire sauce and garlic, you get a really deep beefy and delicious flavour.

How to marinate Portobello Mushroom Burgers

  1. Clean your mushrooms with a damp cloth and remove the stalk.
  2. Add your marinade to a zip lock bag.
  3. Place in your mushrooms and move around with your hands to make sure theyre fully coated.
  4. Marinate for 30mins or as long as you have time for. Even 5 mins will make a difference.

Grilled Portobello Mushroom Burger

These beauties are perfect for the BBQ, but were in the thick of winter now so pan frying is where were at. I dont recommend baking these as you wont get the same caramelization and therefore, theyll be laking in flavour.

Speaking of caramelization&

Portobello Mushroom with Caramelized Onions

With all burger recipes, the toppings/fillings are usually all down to preference. However, I usually claim a few non-negotiables caramelized onions is one of them.

A lot of the juices stay in the pan after youve fried the mushrooms, the onions will soak this up and taste beyond delicious once theyre fried. For proper caramelized onions, you want to fry them low and slow, but here I make quick caramelized onions (with a little help from a tsp of brown sugar).

How to fry Portobello Mushrooms

  1. Add your mushrooms face down to a pan over medium heat and fry for 4-5mins until soft.
  2. Flip mushrooms over.
  3. Add cheese and fry for another 4-5mins or until knife tender with the cheese melted. Remove from pan.
  4. Add onions & sugar and continue to fry until soft and caramelized

When it comes to what cheese to use, here Ive used Swiss, but also regularly use Cheddar.

Portobello Mushroom Burger Fillings

  • Hummus
  • Toasted Bun
  • Tomato
  • Caramelized Onions
  • Watercress
  • Cheese

Feel free to trade out the tomato or watercress, but the hummus, caramelized onions, cheese and TOASTED bun are a must

Okay, lets tuck into the recipe shall we?

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How to make Portobello Mushroom Burgers (Full Recipe & Video)

Portobello Mushroom Burgers

These Portobello Mushroom Burgers are absolutely bursting with flavour! With a simple 4 ingredient marinade, these are sure to be some of the best veggie burgers you've ever had!
5 from 5 votes
Print Pin Rate
Course: Lunch
Cuisine: Vegetarian
Prep Time: 15 minutes
Cook Time: 20 minutes
Marinating Time: 5 minutes
Total Time: 35 minutes
Servings (click & slide): 4
Calories: 292kcal
Author: Chris Collins

Ingredients (check list):

Mushrooms

  • 4 Portobello Mushrooms, stalks removed & cleaned as necessary
  • 2 tbsp Balsamic Vinegar
  • 2 tbsp Soy Sauce
  • 1 tbsp Worcestershire Sauce
  • 1 tsp Garlic
  • 1 tbsp Olive Oil
  • Salt & Black Pepper, to taste

Burger

  • 4 Burger Buns
  • 4 slices of Tomato
  • 4 tbsp Hummus
  • 4 slices of Cheese, here I use Swiss
  • 1 large Red Onion
  • 1 tsp Brown Sugar
  • 1 handful Watercress

Instructions:

  • In a zip lock bag, combine your mushrooms with the marinade. Mix it around so all of the mushrooms are coated, then allow to marinate for 30mins, or as long as you have time for. Even 5mins makes the world of difference.
  • Place your mushrooms facing down on a pan over medium heat and fry 4-5mins. Flip, then top with cheese and fry for another 5mins or until tender. Timings will depend on the size and shape of your mushrooms.
  • Remove from pan, leaving any leftover juice, then add your onions. Fry until soft, then add sugar and continue frying until caramelised. For the best caramelised onions you want to fry low over a long period of time to release their natural sugars, but for convenience this works fine.
  • Top your bottom burger bun with hummus, then watercress, then tomato, next with your mushroom burger, topped with your onions and finished with the top bun. Enjoy!

Quick 1 min demo!

Notes:

a) Calories - Based on the assumption that all the marinade is used, which is of course an over estimate. Also including the toppings listed in the recipe card. Calories per burger.

Nutrition:

Nutrition Facts
Portobello Mushroom Burgers
Amount Per Serving
Calories 292 Calories from Fat 120
% Daily Value*
Fat 13.28g20%
Saturated Fat 5.455g27%
Trans Fat 0.013g
Polyunsaturated Fat 1.492g
Monounsaturated Fat 5.52g
Cholesterol 19mg6%
Sodium 1039mg43%
Potassium 622mg18%
Carbohydrates 32.79g11%
Fiber 3.4g14%
Sugar 11.08g12%
Protein 11.68g23%
Vitamin A 1350IU27%
Vitamin C 11.6mg14%
Calcium 280mg28%
Iron 2.2mg12%
* Percent Daily Values are based on a 2000 calorie diet.
Nutrition is based on the absence of salt unless stated as a measurement in the ingredients. Cost is worked out based on ingredients bought from UK supermarkets, then divided by the number of servings. In both instances these values are just for guidance. Please check out my FAQ Page for more info.
Tried this recipe?Show me how you got on by tagging @dontgobaconmyheart_ on IG and #dontgobaconmyheart!

For another delicious and easy portobello mushroom recipe, check out my Pizza Stuffed Portobello Mushrooms!

If you loved this Mushroom Burger Recipe then be sure to Pin it for later! Already made it or got a burning question? Give me a shout in the comments below and pick up your free ecookbook along the way!


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