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  • Prep-time: / Ready In:
  • Makes 4 burgers

Summer herbs are a treasure trove of flavor, and the bright floral notes of tarragon shine through in this crowd-pleasing burger recipe. Smoky grilled portobellos are layered with fresh spinach, tomato, and a creamy cashew-based tarragon sauce for a meal that will please kids and adults alike. Pair these savory burgers with a handful of Baked French Fries to satisfy all your fast food cravings without the unhealthy ingredients. To make this recipe gluten-free, serve them on certified gluten-free buns. 

Tip: To give the mushroom patties a smoky tarragon flavor, dip sprigs of tarragon in water and toss them onto the coals while grilling.

Grilled Mushroom Burger with Tarragon Crema with a side of french fries


  • ⅓ cup raw cashews, soaked in very hot water for 15 minutes
  • 1 tablespoon tahini
  • 1 tablespoon Dijon mustard
  • 1 tablespoon lemon juice
  • 1 small clove garlic, minced
  • ¼ to ⅓ cup unsweetened, unflavored plant-based milk
  • ¼ cup fresh tarragon, chopped
  • Freshly ground black pepper, to taste
  • 4 portobello mushrooms, stems removed
  • 1 tablespoon balsamic vinegar
  • 4 whole grain hamburger buns, split and toasted
  • 1 cup fresh spinach
  • 4 slices tomato


  1. For sauce, in a blender or small food processor combine soaked, drained cashews with the next four ingredients (through garlic). Cover and blend until smooth, gradually adding plant-based milk until sauce is creamy and spreading consistency. Stir in tarragon. Season with pepper.
  2. Brush mushrooms with vinegar. Grill mushrooms over medium 15 to 20 minutes or until tender, turning once.
  3. Fill buns with spinach, mushrooms, and tomato slices. Spoon sauce over top. Serve immediately.

Comments (5)

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Marcia Carson-Smith2 weeks ago
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Wonderful recipe

Diana Workman2 weeks ago
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Made this last night for dinner and the tarragon sauce was heavenly!! Complimented the portobello and tomato perfectly! I put the mushroom top on half of Dave’s Bread multi grain bun and cut with knife & fork. Seems impossible to grill the mushroom tops for 15 mins but it was needed (on medium heat). Nice, tasty recipe!

ADHD Coach3 weeks ago
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Delicious. My non-vegan spouse loved it, too.

Chris Kepler1 month ago
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This recipe is amazing. You will not be disappointed.

Anna Virginillo1 month ago
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