Grilled Portabella Burger with Basil Mayonnaise
Delight your taste buds with this Grilled Portabella Burger with Basil Mayonnaise—a vegetarian twist on a classic favorite that’s bursting with flavor and freshness. Juicy, marinated portabella mushroom caps are perfectly grilled to a tender, smoky finish, then stacked high on toasted burger buns with crisp lettuce, fresh tomato slices, and a pop of tangy red onion. The star of the show is the homemade basil mayonnaise, a creamy, herb-infused spread that adds a burst of vibrancy to every bite. With a quick 30-minute prep and cook time, this plant-based burger is not only easy to make but also a healthy alternative for your next barbecue or weeknight dinner. Perfect for vegetarians and meat-lovers alike, this recipe delivers gourmet flavor without the fuss!
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Recipe Information
Ingredients
- 4 pieces Portabella mushroom caps
- 3 tablespoons Olive oil
- 2 tablespoons Balsamic vinegar
- 1 teaspoon Garlic powder
- 1 teaspoon Salt
- 0.5 teaspoon Black pepper
- 0.5 cup Mayonnaise
- 10 pieces Fresh basil leaves
- 1 teaspoon Lemon juice
- 4 pieces Burger buns
- 4 pieces Lettuce leaves
- 8 pieces Tomato slices
- 4 pieces Red onion slices
Instructions
Clean the portabella mushroom caps by gently wiping them with a damp paper towel. Remove the stems if still attached.
In a small bowl, whisk together the olive oil, balsamic vinegar, garlic powder, salt, and black pepper.
Brush the marinade mixture generously onto both sides of each mushroom cap. Set aside to marinate for 10 minutes.
Meanwhile, prepare the basil mayonnaise by combining mayonnaise, chopped fresh basil leaves, and lemon juice in a food processor. Blend until smooth. Set aside.
Preheat your grill or grill pan to medium-high heat.
Place the marinated mushroom caps on the grill, gill side down. Cook for about 4-5 minutes per side, or until tender and slightly charred. Remove from the grill and set aside.
Lightly toast the burger buns on the grill, cut side down, for about 1 minute, until golden brown.
To assemble the burgers, spread a generous layer of basil mayonnaise on the bottom half of each bun.
Place a grilled portabella mushroom cap on top of the basil mayonnaise.
Layer with a lettuce leaf, 2 tomato slices, and a slice of red onion.
Top with the other half of the bun and serve immediately.
Nutrition Facts
Calories |
1869 | ||
|---|---|---|---|
% Daily Value* |
|||
| Total Fat | 134.0 g | 172% | |
| Saturated Fat | 14.8 g | 74% | |
| Polyunsaturated Fat | 4.0 g | ||
| Cholesterol | 118 mg | 39% | |
| Sodium | 3406 mg | 148% | |
| Total Carbohydrate | 138.1 g | 50% | |
| Dietary Fiber | 12.4 g | 44% | |
| Total Sugars | 27.9 g | ||
| Protein | 23.8 g | 48% | |
| Vitamin D | 0.7 mcg | 4% | |
| Calcium | 222 mg | 17% | |
| Iron | 7.7 mg | 43% | |
| Potassium | 2219 mg | 47% | |
*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.
