Indulge in a delicious and hearty portobello mushroom burger that offers a satisfying alternative to traditional beef burgers. Perfect for vegetarians and meat-lovers alike, this recipe combines the rich, earthy flavor of portobello mushrooms with a hint of balsamic vinegar and garlic powder. Topped with fresh lettuce, tomato, and onion, this burger is sure to become a favorite at your next cookout.
While most of the ingredients for this recipe are commonly found in your pantry, you may need to pick up portobello mushroom caps and balsamic vinegar if they are not already in your kitchen. Portobello mushrooms are typically found in the produce section, and balsamic vinegar can be located in the condiments aisle. Make sure to choose fresh and firm mushroom caps for the best texture and flavor.

Ingredients for Portobello Mushroom Burger Recipe
Portobello mushroom caps: Large, meaty mushrooms that serve as the base of the burger.
Olive oil: Used to coat the mushrooms and add a rich flavor.
Balsamic vinegar: Adds a tangy and slightly sweet taste to the mushrooms.
Garlic powder: Provides a subtle garlic flavor to the marinade.
Burger buns: Toasted buns that hold the mushroom and toppings together.
Cheese: Optional slices that can be melted on top of the mushrooms.
Salt: Enhances the overall flavor of the mushrooms.
Pepper: Adds a bit of spice to the mushrooms.
Lettuce: Fresh greens for topping the burger.
Tomato: Sliced tomatoes for added freshness.
Onion: Adds a bit of crunch and flavor to the burger.
Technique Tip for This Recipe
When preparing portobello mushrooms for grilling, make sure to remove the gills from the underside of the caps. The gills can hold excess moisture and give a muddy flavor to your burger. Use a spoon to gently scrape them out before marinating. This will also help the marinade penetrate better, enhancing the overall flavor of your burger.
Suggested Side Dishes
Alternative Ingredients
portobello mushroom caps - Substitute with eggplant slices: Eggplant has a meaty texture similar to portobello mushrooms and can absorb flavors well.
olive oil - Substitute with avocado oil: Avocado oil has a high smoke point and a mild flavor, making it a good alternative for grilling.
balsamic vinegar - Substitute with red wine vinegar: Red wine vinegar provides a tangy flavor that complements the other ingredients similarly to balsamic vinegar.
garlic powder - Substitute with fresh minced garlic: Fresh minced garlic offers a more robust and aromatic flavor compared to garlic powder.
toasted burger buns - Substitute with whole wheat buns: Whole wheat buns add a nutty flavor and extra fiber, making the burger healthier.
cheese - Substitute with avocado slices: Avocado slices provide a creamy texture and healthy fats, making them a great dairy-free alternative.
salt - Substitute with soy sauce: Soy sauce adds a savory umami flavor and can reduce the need for additional salt.
pepper - Substitute with cayenne pepper: Cayenne pepper adds a bit of heat and a different flavor profile to the burger.
lettuce - Substitute with spinach leaves: Spinach leaves offer more nutrients and a slightly different texture compared to lettuce.
tomato - Substitute with roasted red peppers: Roasted red peppers add a sweet and smoky flavor that complements the other ingredients well.
onion - Substitute with caramelized onions: Caramelized onions provide a sweet and rich flavor that enhances the overall taste of the burger.
Alternative Recipes Similar to This Burger
How To Store or Freeze Your Burger
Allow the portobello mushroom caps to cool completely before storing. This prevents condensation, which can make them soggy.
Place the cooled mushroom caps in an airtight container. If stacking, separate each layer with parchment paper to avoid sticking.
Store the container in the refrigerator. The mushroom caps will stay fresh for up to 3-4 days.
For freezing, wrap each mushroom cap individually in plastic wrap or aluminum foil. This helps to preserve their texture and flavor.
Place the wrapped mushroom caps in a freezer-safe bag or container. Label with the date to keep track of freshness.
When ready to use, thaw the mushroom caps in the refrigerator overnight. Avoid microwaving as it can make them rubbery.
Reheat the mushroom caps on a grill or in a skillet over medium heat until warmed through. This helps to retain their original texture and flavor.
If you have leftover assembled burgers, store them in the refrigerator in an airtight container. They are best consumed within 1-2 days.
To reheat assembled burgers, use an oven preheated to 350°F (175°C). Place the burgers on a baking sheet and cover with foil. Heat for about 10-15 minutes or until warmed through.
Avoid freezing assembled burgers with toppings like lettuce, tomato, and onion, as these can become mushy when thawed.
How To Reheat Leftovers
Oven Method: Preheat your oven to 350°F (175°C). Place the portobello mushroom caps on a baking sheet lined with parchment paper. Cover them loosely with aluminum foil to prevent drying out. Heat for about 10-15 minutes or until warmed through. This method helps maintain the juicy texture of the mushrooms.
Stovetop Method: Heat a non-stick skillet over medium heat. Add a small amount of olive oil to the pan. Place the portobello mushroom caps in the skillet and cover with a lid. Heat for about 3-5 minutes on each side, or until warmed through. This method is quick and keeps the mushrooms tender.
Microwave Method: Place the portobello mushroom caps on a microwave-safe plate. Cover with a microwave-safe lid or another plate to trap steam. Heat on medium power for 1-2 minutes, checking halfway through. Be cautious not to overheat, as this can make the mushrooms rubbery.
Grill Method: Preheat your grill to medium heat. Wrap the portobello mushroom caps in aluminum foil to retain moisture. Place them on the grill and heat for about 5 minutes, flipping halfway through. This method gives a nice, slightly smoky flavor.
Air Fryer Method: Preheat your air fryer to 350°F (175°C). Place the portobello mushroom caps in the air fryer basket in a single layer. Heat for about 5-7 minutes, checking halfway through. This method is great for achieving a slightly crispy exterior while keeping the inside juicy.
Toaster Oven Method: Preheat your toaster oven to 350°F (175°C). Place the portobello mushroom caps on the toaster oven tray. Cover loosely with aluminum foil. Heat for about 10 minutes or until warmed through. This method is convenient and effective for small batches.
Best Tools for This Recipe
Grill or grill pan: Essential for cooking the portobello mushroom caps to achieve that smoky, charred flavor.
Small bowl: Used for mixing the olive oil, balsamic vinegar, and garlic powder.
Basting brush: Handy for brushing the olive oil mixture onto the mushroom caps evenly.
Tongs: Useful for flipping the mushroom caps on the grill without damaging them.
Spatula: Can be used to handle the mushrooms and place them onto the buns.
Knife: Necessary for slicing the optional cheese, lettuce, tomato, and onion.
Cutting board: Provides a safe surface for slicing the toppings.
Measuring spoons: Ensures accurate measurement of the olive oil, balsamic vinegar, and garlic powder.
Serving plate: For assembling and serving the finished burgers.
How to Save Time on This Recipe
Prepare the marinade: Mix the olive oil, balsamic vinegar, and garlic powder in advance and store in the fridge.
Preheat the grill: Start preheating your grill while you prep the mushrooms to save time.
Use pre-sliced cheese: Opt for pre-sliced cheese to avoid extra prep work.
Prep toppings ahead: Slice your lettuce, tomato, and onion beforehand and store them in the fridge.
Toast buns together: Toast all burger buns simultaneously on the grill to save time.

Portobello Mushroom Burger
Ingredients
Main Ingredients
- 4 Portobello mushroom caps stems removed
- 2 tablespoon Olive oil
- 1 teaspoon Balsamic vinegar
- 1 teaspoon Garlic powder
- 4 Burger buns toasted
- 4 slices Cheese optional
- to taste Salt and pepper
- as needed Lettuce, tomato, onion for topping
Instructions
- 1. Preheat your grill or grill pan to medium-high heat.
- 2. In a small bowl, mix together the olive oil, balsamic vinegar, and garlic powder.
- 3. Brush the mixture onto both sides of the portobello mushroom caps. Season with salt and pepper.
- 4. Place the mushrooms on the grill, gill side down, and cook for about 5 minutes. Flip and cook for another 5 minutes, or until tender.
- 5. If using cheese, place a slice on each mushroom cap during the last minute of cooking to melt.
- 6. Assemble the burgers by placing each mushroom cap on a toasted bun and adding your desired toppings.
Nutritional Value
Keywords
Suggested Appetizers and Desserts
More Amazing Recipes to Try 🙂
- Italian Chicken Pesto with Spaghetti Squash Recipe1 Hours
- Rhubarb Crisp Recipe1 Hours
- Patriotic Pasta Recipe35 Minutes
- Sponge Cake Recipe50 Minutes
- Yogurt Parfait Recipe10 Minutes
- Eggless Strawberry Ice Cream Recipe6 Hours 15 Minutes
- Italian Cheesecake Recipe1 Hours 20 Minutes
- French Salad Dressing Recipe10 Minutes
Leave a Reply