Portobello Mushroom Burger Recipe


Portobello Mushroom Burgers are a great vegetarian alternative when you want something meaty and filling but you don’t want the bloat that can come with a traditional bean patty. Customize to suite your tastes just as you would a regular cheeseburger.

For added instruction and entertainment watch PORTO-BAMO! — How to Make a Portobello Mushroom Burger Video.

Ingredients for EACH Portobello Mushroom Burger:
1 large Portobello Mushroom
1 TBSP balsamic vinegar
1 TBSP olive oil
pepper & salt to taste
2 “wheels” sliced onion
1/4 of a medium red bell pepper, sliced (or similar)
provolone cheese (or similar)
lettuce, tomato, or other toppings

Ingredients for Spread used in the Video:
3 TBSP mayonnaise
6 fresh basil leaves
1 TBSP fire-roasted red pepper
pepper & salt to taste
1 tsp fresh lemon (optional)
1/2 tsp finely minced fresh garlic (optional)

Portobello Mushroom Burger Recipe
Each Portobello Mushroom makes one sandwich. The Spread Recipe makes enough for two sandwiches. For added instruction and entertainment, watch PORTO-BAMO! — How to Make a Portobello Mushroom Burger Video.

Portobello Mushroom Burger Recipe
1) Make the spread: Combine all ingredients in a blender or food processor, or finely chop all ingredients and stir into mayonnaise. Set aside in the refrigerator until ready to use.
2) Marinate the portobellos: In a bowl, coat the mushrooms with balsamic vinegar, olive oil and fresh cracked pepper. Allow to marinate about 20 minutes.
3) On a preheated grill, grill pan or griddle, cook onions and peppers until desired tenderness and color.
4) Salt, then grill marinated portobellos 4-5 minutes on each side, also until desired tenderness.
5) Melt cheese on desired side of the mushroom. You may prefer to melt the cheese on the underside of the portobello (stem side up), I prefer to melt it on the domed side (stem side down).
6) Build the sandwich: Bottom bun, spread, fresh tomatoes, lettuce, grilled portobello, onions, peppers, top bun (with more spread, if desired).
7) Share and enjoy!

Portobello Mushroom Burger Video
For added instruction and entertainment watch PORTO-BAMO! — How to Make a Portobello Mushroom Burger Video, give it a thumbs up and please subscribe to my channel on YouTube.

Portobello Mushroom Burger Recipe

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3 Responses to “Portobello Mushroom Burger Recipe”

  1. Claire
    10/14/2012 at 5:04 am #

    Hi Sara – Just wanted to say I am a HUGE fan and have been for ages. Watch all your videos and my families faves have been the fried rice and the fish tacos. YUM. Can you tell me if you have a print version of this recipe? Thanks so much.

  2. Average Betty
    10/14/2012 at 8:13 am #

    Hi Claire, Thanks for making my day! So glad you love the fried rice and fish tacos — those are two of my faves too! I’m actually scheduled to redo the fried rice video — it was my first!

    I kinda stopped putting the printables on the site in an effort to reduce waste; so I’m emailing you the recipe. Just say the word if there are any others you’d like in printable form.

    Thanks again!!


  1. PORTO-BAMO! How to Make a Portobello Mushroom Burger Video | Average Betty - 10/15/2012

    […] While I’m still perfecting my ultimate Veggie Burger Patty, I thought I’d satisfy the meatless mayhem with one of my favorites, a Portobello Mushroom Burger! […]

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