• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar

Oh My Veggies logo

  • Recipes
    • Vegetarian Recipes
    • Vegan Recipes
    • Vegetarian Main Dishes
    • Vegetarian Appetizers
    • Vegetarian Breakfast Recipes
    • Vegetarian Side Dishes
    • Dessert Recipes
    • Snack Recipes
    • Drinks
    • Sauces, Spreads and Condiments
    • Holiday Recipes
    • From our Readers
  • Cooking Tips & Hints
    • Cooking Tips
    • Plant-Based Nutrition
    • Product Reviews
  • Shop Cookbooks
  • About Us
  • Nav Social Menu

    • Facebook
    • Instagram
    • Pinterest
    • Twitter
menu icon
go to homepage
  • Find Recipes
  • Cookbooks
  • About Us
  • Freebies!
    • Facebook
    • Instagram
    • Pinterest
    • Twitter
  • subscribe
    search icon
    Homepage link
    • Find Recipes
    • Cookbooks
    • About Us
    • Freebies!
    • Facebook
    • Instagram
    • Pinterest
    • Twitter
  • ×
    Oh My Veggies » Vegan Recipes

    Marinated Portobello Burgers with Creamy Pesto Sauce

    Published: May 30, 2022 · by Nicole · Updated: May 30, 2022 · This post may contain affiliate links.

    Jump to Recipe - Print Recipe
    portobello mushroom burgers
    portobello mushroom burgers
    portobello mushroom burgers

    Marinated Portobello Burgers are a great way to use up portobello mushrooms! A marinated portobello that then gets pan seared or tossed on the grill and cooked perfectly. Then pair with a creamy pesto sauce, bun, and your favorite burger toppings. This is the ultimate mushroom burger recipe. 

    portobello mushroom burgers

    A vegetarian burger that is perfect for grilling season. Even those who enjoy meat will enjoy this portobello mushroom burgers recipe. So don't wait, try this veggie burger today. 

    Check out my portobello steaks, my portobello mushroom cheesesteaks for other easy and delicious mushroom recipes. 

    This Portobello Burger Recipe Is...

    • Vegetarian 
    • Can Be Vegan Friendly (use dairy substitute and vegan Worcestershire sauce) 
    • Easy to Make 
    • Can Be Cooked On Stove or Grill 
    • Party Friendly Food 
    • Homemade Pesto For Optimal Flavor

    How to Make Portobello Burgers 

    portobello mushroom burgers

    Full directions on how to make this mushroom burger are in the printable recipe card below. This is a quick walk through on how to make them. 

    1. Start by removing the stalk from the mushrooms. 
    2. In a bowl or bag add all the ingredients for the marinade, along with mushrooms. Coat the mushrooms, and let them marinade for 30 minutes. 
    3. Chop up your onions, and place in a large skillet with some oil, and cook until golden brown. Then finish cooking until they are caramelized. 
    4. For the pesto mayonnaise add your ingredients into a bowl and whisk together until mixed and no lumps. 
    5. Cook your mushrooms cap side down in a heated skillet on the stove, or toss on the grill. Cook until they are tender. 
    6. Then assemble your bun with the pesto sauce, tomatoes, caramelized onions, and your mushroom burger. 

    Recipe Tips For Success 

    portobello mushroom burgers

    Mushroom Prep 

    Make sure that you remove the stalks of the mushrooms before you marinade them. Then clean your mushrooms if they have dirt, debris left on them. 

    Marinating 

    Make sure that when you marinate the portobello mushrooms you place them cap side down in the marinade. They will draw in more flavor from the marinade offering a richer flavor to your veggie burger. 

    Caramelizing Onions 

    Make sure to check on your onions as they cook. Otherwise, you can end up burning the onions. They will take awhile to caramelize but they need to be stirred often or it will cause the onions to burn. 

    Variations To Mushroom Burger 

    portobello mushroom burgers

    Burger 

    If you want you can transform these into little slider burgers instead of regular size burgers. Just cook up the same and place the mushroom on slider buns, and then slice to fit the rolls. Add your favorite condiments and devour. 

    Toppings 

    Don't feel you have to pair with the caramelized onions. I find that it is a great way to elevate your burger, but isn't a half too. Top with any of your favorite hamburger toppings. 

    Serve Differently 

    Instead of a bun, serve with a bed of rice, or just pile your toppings on top and skip the bun altogether. 

    Flavor 

    Switch up how you marinade by changing out spices with ones you know and love. There is so much you can do to flavor the mushrooms and have success. 

    Mushroom Burger FAQs

    portobello mushroom burgers

    Can I use a different variety of mushroom? 

    The hard thing with swapping out the mushrooms is it is going to be hard to get that large flat burger texture to fit in the bun. You are welcome to experiment and see what you like. 

    What can I do with the stems of mushrooms? 

    Don't throw away the mushroom stems. Just store them back in a container in the fridge and use them for mixing in a casserole, omelet, etc. They will work great for chopping up and mixing into other recipes in the future. 

    Do mushroom burgers store well? 

    I find the burgers are best eaten fresh. If you don't eat them all, store in the fridge for 2-3 days. Then reheat and enjoy. The texture will be a bit different once they have cooled down and been refrigerated. 

    Recipe

    portobello mushroom burgers

    Marinated Portobello Burgers with Creamy Pesto Sauce

    These are the ultimate Portobello Burgers! Tender portobello mushrooms are marinated, cooked to perfection, and topped with a homemade creamy pesto sauce. Yum.
    Print Recipe Pin Recipe Email Recipe
    Prep Time: 45 minutes minutes
    Cook Time: 30 minutes minutes
    Total Time: 1 hour hour 15 minutes minutes
    Course: Main Course, Side Dish
    Cuisine: American
    Diet: Vegan, Vegetarian
    Keyword: mushroom burger recipe, portobello burgers, portobello mushroom burgers, vegetarian burger, vegetarian grilling
    Servings: 4 portobello burgers
    Calories: 512kcal
    Author: Oh My Veggies

    Ingredients

    • 4 large portobellos
    • 4 hamburger rolls vegan brand if desired
    • 2 onions
    • 1 large tomato
    • 2 tbsp olive oil

    To marinate the portobellos

    • 1 tbsp balsamic vinegar
    • 1 tbsp soy sauce
    • 1 tbsp Worcestershire sauce vegan brand if desired
    • ½ tbsp olive oil
    • ½ tsp garlic powder
    • 1 tsp smoked paprika
    • ¼ tsp salt

    Pesto Mayonnaise

    • ⅓ cup mayonnaise use vegan mayo or dairy free yogurt for a vegan version
    • ⅓ cup pecan nuts or walnuts or pine nuts
    • 1 cup fresh basil leaves packed
    • 1 tbsp nutritional yeast
    • 2 garlic cloves minced
    • ¼ tsp salt
    • 2 tbsp olive oil
    US Customary - Metric

    Instructions

    • Remove portobellos stalks. Mix all the ingredients to marinate the portobellos. Using a cooking brush, toss them with the sauce on both sides. Let them marinate for 30 minutes, with the cap side down.
      portobello mushroom burgers
    • Chop onions in thin slices. Place them in a large skillet with 2 tbsp of olive oil, cook them at medium heat until golden brown.
      portobello mushroom burgers
    • The onions will need between 25-30 to be caramelized. Stir it regularly; otherwise, it will burn.
      portobello mushroom burgers
    • Combine all ingredients for the pesto mayonnaise in a blender. Use either a stick blender or a regular blender.
      portobello mushroom burgers
    • Blend all the ingredients.
      portobello mushroom burgers
    • Blend until you have a smooth, creamy paste. Adjust salt to taste.
      portobello mushroom burgers
    • Cook the portobellos cap side down in a heated skillet, grill or BBQ until tender. It will take 8-10 minutes.
      portobello mushroom burgers
    • To make the burgers, first add pesto mayonnaise to the bread.
      portobello mushroom burgers
    • Next, add caramelized onions.
      portobello mushroom burgers
    • Add a juicy portobello.
      portobello mushroom burgers
    • Top with a slice of tomato and cover with bread. Enjoy!
      portobello mushroom burgers

    Notes

    • Portobellos are my favorite choice when going to BBQs or inviting friends over. They are extremely delicious, juicy and adaptable to any kind of add-on that you can think of. Just get creative by adding different seasonings, vegetables or even some melted cheese.

    Nutrition

    Calories: 512kcalCarbohydrates: 36gProtein: 10gFat: 38gSaturated Fat: 5gPolyunsaturated Fat: 13gMonounsaturated Fat: 18gTrans Fat: 1gCholesterol: 8mgSodium: 942mgPotassium: 674mgFiber: 5gSugar: 10gVitamin A: 841IUVitamin C: 11mgCalcium: 109mgIron: 3mg
    Craving more veg-friendly recipes? Shop our collection of vegetarian and vegan cookbooks, including our new Vegan Thanksgiving and Vegan Christmas cookbooks!
    « Strawberry Chia Jam
    25+ Strawberry Recipes For Summer »

    Vegan Dinner Recipes, Vegan Main Dishes, Vegan Recipes, Vegan Sandwiches & Wraps, Vegan Weeknight Meals, Vegetarian Main Dishes, Vegetarian Recipes, Vegetarian Sandwiches & Wraps main dishes, mushroom burger recipe, mushrooms, pesto sauce, portobellos

    Reader Interactions

    Comments

    No Comments

    5 from 3 votes (3 ratings without comment)

    Something to say? Leave a comment. Cancel reply

    Your email address will not be published. Required fields are marked *

    Recipe Rating




    Primary Sidebar

    image of the author

    Nicole is a life long vegetarian and the author of the popular vegan cookbook, Weeknight One Pot Vegan Cooking. She loves sharing her recipes and showing the world just how easy and delicious meatless meals can be!
    Learn more here.

    signature of author

    get a free 5 day vegetarian meal plan

    shop our vegetarian and vegan cookbooks

    Footer

    ↑ back to top

    • Shop Cookbooks
    • About Us
    • Work with Me
    • Contact
    • Privacy Policy
    • Terms of Use

    Still hungry? Check out our delicious family of blogs.

    veg kitchen
    step away from the carbs
    all she cooks
    midlife rambler
    wandertooth logo

    As an Amazon Associate I earn from qualifying purchases.

    Copyright © 2023 Hook & Porter Media

    Rate This Recipe

    Your vote:




    A rating is required
    A name is required
    An email is required

    Recipe Ratings without Comment

    Something went wrong. Please try again.