Portobello Mushroom Burger
A Fresh Take on a Classic
A Ditch the beef for a “fleshy” Portobello stack that’s been marinated in garlic and balsamic.
The secret to a perfect mushroom burger is achieving a deep, caramelized sear without losing the juice, which is where The Whatever Pan excels. Its signature griddle ridges create those professional char marks while the cast aluminum body ensures the mushrooms cook through evenly. By using the glass lid during the final stage, you can trap just enough heat to melt the cheese perfectly over your double-mushroom stack, creating a rich, decadent center that pairs beautifully with fresh pesto and peppery rocket.
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Serves
2
Course
Main
Prepare
35 mins
Cooks
10 mins
4 Large Portobello mushrooms (stems and gills removed)
4 slices Thin cheese (Swiss, Provolone, or Cheddar)
2 Burger buns
2 tbsp Low-sodium soy sauce
2 tbsp Balsamic vinegar
1 tbsp Extra-virgin olive oil
3 cloves Garlic, minced
1 1/2 tsp Italian seasoning
1/2 tsp Black pepper
To Assemble: Pesto, Red onion (sliced), Tomato (sliced), Rocket leaves
1 The Marinade: In a large sealable bag or shallow dish, combine soy sauce, balsamic vinegar, olive oil, garlic, Italian seasoning, and pepper.
2 Marinate: Place the cleaned mushrooms into the marinade, coating them thoroughly. Let them soak up the flavors for at least 30 minutes.
3 Prep: While the mushrooms marinate, slice your buns and prepare your fresh toppings (tomato, onion, and rocket).
4 Grill: Heat your Whatever Pan over medium heat with a light coating of oil. Shake off excess marinade and place mushrooms on the pan.
5 Sear: Grill for approximately 10 minutes total, turning once. Brush frequently with the leftover marinade to keep them juicy.
6 The Stack: In the final minute, flip two mushrooms gills-side up. Top with cheese, then stack the remaining mushrooms on top. Lower the heat (and use the glass lid if needed) to melt the cheese.
7 Toast: Quickly grill the sliced onions and buns on the Whatever Pan until lightly charred.
8 Assemble: Spread pesto on the bottom bun. Layer with rocket, the cheesy mushroom stack, grilled onion, and tomato. Top with the bun and serve hot.
| Nutrient | Per Serving |
|---|---|
| Energy | 385 kcal |
| Fat | 22g |
| Fiber | 5g |
| Carbohydrates | 32g |
| Sugars | 9g |
| Protein | 14g |
Nutritional information is an estimate per serving.