Low Calorie Portobello Mushroom Burgers

This Low Calorie Portobello Mushroom Burgers is just 343 calories! It’s also quick cook and prep time, and you can cook these portobello mushroom recipes 4 ways.

Find these healthy recipes for portobello burgers below, along with lots of tips, tricks, and shortcuts to get dinner on the table right away.

Learn how to cook portobello mushroom burger recipes 4 ways!

• Grilled
• Baked
• Sautéed
• Air fried

These healthy portobello mushroom recipes can be made anyway you like… on the BBQ, in the Oven, on the Stove Top, and even in the Air Fryer!

This portobello mushroom burger recipe can be made 4 ways, and is just 343 calories!

Low Calorie Portobello Mushroom Burgers

Ingredients in Healthy Portobello Mushroom Burgers

These portobello mushroom cap burgers are packed full of flavor, I find that they don’t even need ketchup, mustard or sauce! The avocado becomes the sauce! Yum!

But if you are looking for a good mushroom burger sauce, here are a few vegan favorites.

Optional Vegan Sauces for Portabello Burgers:

• Vegan Special Sauce
• Creamy Chipotle Sauce (vegan!)
• Vegan Buffalo Sauce
• Hawaiian Style BBQ Sauce

Shopping List for Healthy Portobello Burgers:

• Large portobello mushrooms
• Homemade Seasoning Salt
• Olive oil spray
• Red onion
• Avocado
• Lime
• Vegan burger buns (or your favorite)
• Tomato 
• Baby spinach (or your favorite greens)
• Mustard and Ketchup (optional- for serving)

How to Make Healthy Portobello Burgers

You can make these portobello burgers 4 ways!

Below you’ll learn how to make a baked portobello mushroom burger. Learn the temp and timing for grilling portobello mushroom burgers, how to air fry portobello burgers… and even how to use a sauté pan to make these healthy portobello burgers.

How to Make Portobello Burgers on the Grill:

1. Preheat the grill to medium heat.
2. Remove the stems from the portobello mushrooms, and clean the caps with a damp cloth or paper towel.
3. Slice the onion into 2 rings.
4. Spray the mushrooms and onions with olive oil. And sprinkle all over with seasoning salt.
5. Add the mushrooms to the hot grill, gill side up (cut side up). And add the onions alongside them.
6. Cook 7 minutes, flip and cook for an additional 5-7 minutes, until the mushrooms are tender and the onions are soft.
7. Meanwhile, add the avocado and lime juice to a medium bowl. Smash with the back of a fork until spreadable.
8. Add 1/2 of the smashed avocado to the bottom of each bun. Top each with the cooked portobellos, then the tomato, grilled onions, and spinach.
9. Add ketchup, mustard, or your favorite burger sauce, and serve hot.
10. Special Toasting Tip- I like to toast the buns, if you’re using a BBQ to make these mushroom burgers you can just add them cut side down on the grill for the last minute or so… watch them so they don’t burn!

How to Cook Portobello Burgers in the Oven:

1. Preheat the oven to 375 degrees and spray a baking sheet with olive oil.
2. Remove the stems from the portobello mushrooms, and clean the caps with a damp cloth or paper towel.
3. Slice the onion into 2 rings.
4. Add the mushrooms (cut side down) and onions to the prepared baking sheet and sprinkle with seasoning salt.
5. Bake for 20 minutes, until the mushrooms are tender and the onions are soft.
6. Meanwhile, add the avocado and lime juice to a medium bowl. Smash with the back of a fork until spreadable.
7. Add 1/2 of the smashed avocado to the bottom of each bun. Top each with the cooked portobellos, then the tomato, grilled onions, and spinach.
8. Add ketchup, mustard, or your favorite burger sauce, and serve hot.
9. Special Toasting Tip- I like to toast the buns, if you’re baking these mushroom burgers you can just add them, cut side up on a clean baking sheet for the last 1-3 minutes.

How to Make Portobello Burgers on the Stovetop:

1. Preheat a grill pan or large skillet over medium heat.
2. Remove the stems from the portobello mushrooms, and clean the caps with a damp cloth or paper towel.
3. Slice the onion into 2 rings.
4. Spray the mushrooms and onions with olive oil. And sprinkle all over with seasoning salt.
5. Add the mushrooms to the hot pan, gill side up (cut side up). And add the onions alongside them.
6. Cook 7 minutes, flip and cook for an additional 5-7 minutes, until the mushrooms are tender and the onions are soft.
7. Meanwhile, add the avocado and lime juice to a medium bowl. Smash with the back of a fork until spreadable.
8. Add 1/2 of the smashed avocado to the bottom of each bun. Top each with the cooked portobellos, then the tomato, grilled onions, and spinach.
9. Add ketchup, mustard, or your favorite burger sauce, and serve hot.
10. Special Toasting Tip- I like to toast the buns, if you’re using a grill pan or skillet to make these mushroom burgers you can just start by toasting the buns, cut side down in the pan for 2-3 minutes or so… then begin cooking the rest. As a bonus, they will crunch up a little more while they cool.

How to Cook Portobello Burgers in the Air Fryer:

1. Preheat the air fryer to 370 degrees.
2. Remove the stems from the portobello mushrooms, and clean the caps with a damp cloth or paper towel.
3. Slice the onion into 2 rings.
4. Spray the mushrooms and onions with olive oil. And sprinkle all over with seasoning salt.
5. Carefully add the mushrooms to the hot air fryer, cut side down. And add the onions alongside them.
6. Air fry for 7 minutes, the mushrooms will be tender and the onions soft.
7. Meanwhile, add the avocado and lime juice to a medium bowl. Smash with the back of a fork until spreadable.
8. Add 1/2 of the smashed avocado to the bottom of each bun. Top each with the cooked portobellos, then the tomato, grilled onions, and spinach.
9. Add ketchup, mustard, or your favorite burger sauce, and serve hot.
10. Special Toasting Tip- I like to toast the buns, you can do this in the oven. Add cut side up to a clean baking sheet and bake for 1-3 minutes at 375 degrees.

Low Calorie Portobello Mushroom Burgers

What makes this the best portobello mushroom sandwich or burger, is that you can cook it 4 different ways!

I’ve even supplied you with 4 vegan burger sauces (above!) and showed you how easy it is to cut calories… This way you can enjoy these vegan burgers for just 343 calories.

Nutrition and Calories in Portobello Mushroom Burgers

What to Read Next:

Lose Weight By Eating Cookbooks

Share this Low Calorie Vegan Recipe:

Article History:

• Originally written and published February 8, 2022 by Audrey Johns
• Updated on April 18, 2023 by Audrey Johns