Home Healthy Burger Recipes Vegetarian Portobello Burger

Vegetarian Portobello Burger

by Jennifer McDonald
portobello burger

As we all know, there are quite a few recipe options out there for vegetarian burgers. Most of them are some bean patty. Those are great and all, but you want something that is easier and has fewer calories every now and then. This vegetarian portobello burger is what I cook most of the time on the grill at home. It is easy and tastes great!

portobello burger

Vegetarian Portobello Burger

Jennifer McDonald
If you are tired of vegetarian burger that's made of beans, here's a veggie burger for to try. This portobello burger is just as tasty and healthy.
5 from 1 vote
Prep Time 10 minutes
Cook Time 10 minutes
Total Time 20 minutes
Course Main Course
Cuisine American
Servings 6 people
Calories 250 kcal


  • 6 medium hamburger buns
  • 1 pound portobello mushrooms
  • 1 teaspoon olive oil for seasoning
  • 2 medium zucchinis sliced
  • ½ cup onion sliced thinly
  • 3 tablespoons barbecue dry rub
  • 1 tablespoon olive oil for cooking
  • 1 tablespoon Agave maple, simple syrup
  • 1 medium avocado mashed
  • 1 pinch salt to taste
  • 1 pinch pepper to taste


  • Start with seasoning the mushrooms and zucchini. Place them in the mixing bowl with about a teaspoon of olive oil and a few dashes of your favourite dry rub. Toss/mix this up until the mushrooms are coated. Then blend in a food processor.
  • Portion into 6 balls to flatten into patties.
  • Before you start cooking the mushrooms and zucchini patties, get your onions going. The goal is to caramelize them. I mix about three ounces of water with about a tablespoon of agave syrup. You can use simple syrup or maple syrup as alternatives. Heat the pan with about a tablespoon of olive oil and add sliced onions, water, syrup, salt and pepper. Let them cook until they are translucent. This takes a while. So use low/medium heat.
  • Cook your veggies! Pre-heat your grill. I put on high heat and cook the veggies for about 3 minutes per side. Also, I always cook my veggies medium-rare.
  • I like to toast my buns on the grill while I am cooking my veggies. Another thing that you can do while the veggies are cooking is mash an avocado.
  • Now that your veggies are grilled, onions are caramelized, mashed avocado and buns are toasted – you can build your burger.


Calories: 250kcalCarbohydrates: 35gProtein: 8gFat: 10gSaturated Fat: 2gPolyunsaturated Fat: 2gMonounsaturated Fat: 6gTrans Fat: 0.003gSodium: 235mgPotassium: 694mgFiber: 5gSugar: 10gVitamin A: 233IUVitamin C: 17mgCalcium: 102mgIron: 3mg
Did you give this recipe a whirl?We’re all ears to hear about your results!

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5 from 1 vote (1 rating without comment)
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