Best Portobello Mushroom Burger Recipe

Introduction

Enjoy a delicious and satisfying vegetarian twist on a classic burger with this Best Portobello Mushroom Burger recipe. Juicy, flavorful portobello mushrooms are marinated, grilled, and topped with creamy Brie and pesto mayo for a gourmet experience at home.

Ingredients

• 4 portobello mushroom caps
• ¼ cup olive oil
• 2 Tbsp. lemon juice
• 1 garlic clove, minced
• ¼ tsp. salt
• ¼ tsp. pepper
• 3 Tbsp. mayonnaise
• 1 Tbsp. pesto (store-bought or homemade)
• 4 oz. Brie cheese
• 4 hamburger buns

Instructions

1. Step 1: Trim the stems off the portobello mushrooms and wipe off any dirt using a wet paper towel.
2. Step 2: In a bowl, whisk together olive oil, lemon juice, minced garlic, salt, and pepper. Place mushrooms gill-side down on a plate and brush lightly with the olive oil mixture. Flip mushrooms and brush the gill side with the remaining mixture. Let them sit for 10 minutes to absorb the flavors.
3. Step 3: Preheat a grill to medium heat. Place mushrooms gill side up on the grill and cook until grill marks appear underneath, about 4 minutes. Turn the mushrooms 90° to create crosshatch grill marks and cook for 2 more minutes. Flip the mushrooms and repeat the grilling. Then flip once more, place 1 ounce of Brie on each mushroom, and allow it to melt before removing from the grill.
4. Step 4: In a small bowl, combine mayonnaise and pesto. Spread about 1 tablespoon of this mixture on each hamburger bun. Assemble the burgers by placing a grilled mushroom on each bun, then add your favorite toppings as desired.

Tips & Variations

• For a smoky flavor, add a splash of smoked paprika or chipotle powder to the marinade.
• If Brie isn’t available, try melting mozzarella or Swiss cheese on the mushrooms instead.
• Toast the buns lightly on the grill for extra texture and flavor.
• Add fresh arugula or spinach for a peppery green contrast.
• Use a vegetarian or vegan mayonnaise and cheese for a plant-based option.

Storage

Store any leftover grilled mushrooms and sauce separately in airtight containers in the refrigerator for up to 2 days. Reheat mushrooms gently on the grill or in a skillet before assembling. Avoid storing assembled burgers to keep buns from becoming soggy.

How to Serve

Serve this delicious recipe with your favorite sides.

FAQs

Can I use other types of mushrooms for this burger?

While portobello mushrooms are ideal due to their size and meaty texture, large cremini or shiitake mushrooms can be used but may require adjustment in cooking time.

How do I prevent the mushrooms from becoming soggy?

Marinate mushrooms briefly and grill on medium heat to prevent excess moisture buildup. Also, assemble burgers just before serving to keep buns crisp.