The Ultimate Beef Burger in a Portobello Mushroom Bun

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The Ultimate Beef Burger in a Portobello Mushroom Bun features a combination of sirloin, brisket, and beef back rib meat sandwiched between two savory portobello mushroom caps.

5 from 1 vote

The Ultimate Beef Burger in a Portobello Mushroom Bun

Prep Time: 10 minutes
Cook Time: 30 minutes
Total Time: 40 minutes
Servings: 8
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Ingredients 

  • 1 pound ground sirloin
  • ½ pound ground brisket
  • ½ pound ground meat from beef back ribs
  • 16 small portobello mushrooms, , stems removed
  • 1 tablespoon sesame seeds
  • Olive oil
  • Kosher or fine sea salt
  • Freshly ground black pepper

Instructions 

  • In a medium bowl, combine ground meats, 1½ teaspoons of salt and ½ teaspoon of pepper. Shape mixture into patties, about 3 inches in diameter and 1-inch thick. Press an indentation into the center of each patty.
  • In a large sauté pan set over medium-high, heat 1 tablespoon of olive oil. Add patties and cook, covered, for 6-8 minutes per side or until an instant-read thermometer inserted into the side of the burger reads 160°F. Transfer to a plate and cover to keep warm.
  • Meanwhile, generously brush mushrooms with olive oil and season with salt and pepper to taste. In a large sauté pan set over medium-high, cook in batches for 2-3 minutes each side or until golden and tender. Sprinkle half of the cooked mushrooms with sesame seeds. These will be the “tops”.
  • Place half of the cooked mushrooms top-side down. Add beef patties and desired toppings. Sandwich with remaining mushrooms, top-side up, to serve.
  • Serving suggestion: Top burgers with spring mix, heirloom tomatoes, red onions, and horseradish mayonnaise.
  • To make horseradish mayo: Stir together ½ cup mayo (I use soy-free mayo), 2 teaspoons of prepared horseradish, 1 teaspoon of drained and chopped capers, 1 teaspoon of lemon juice, 1 teaspoon of finely chopped fresh dill, and salt and pepper, to taste.

Nutrition

Calories: 249kcalCarbohydrates: 7gProtein: 24gFat: 15gSaturated Fat: 5gPolyunsaturated Fat: 1gMonounsaturated Fat: 6gTrans Fat: 1gCholesterol: 68mgSodium: 91mgPotassium: 921mgFiber: 2gSugar: 4gVitamin A: 4IUCalcium: 30mgIron: 3mg

Nutrition information is automatically calculated, so should only be used as an approximation.

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