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Mushroom Smash Burgers Recipe

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★★★★★

4.8 from 91 reviews

These Mushroom Smash Burgers are a delicious, vegetarian-friendly alternative to traditional beef burgers. Featuring large portobello mushrooms flattened and seared to a perfect golden-brown with melted sharp Cheddar cheese, they are served on toasted buns with your favorite fresh toppings and condiments. The mushrooms are seasoned with onion powder and a mild neutral oil, and cooked in a cast-iron skillet to achieve maximum flavor and texture. This recipe is quick, easy, and perfect for a satisfying meatless meal.

Ingredients

Scale

Mushroom Patties

  • 1/4 cup neutral oil, such as grapeseed, plus more as needed
  • 1 teaspoon onion powder
  • Salt and black pepper, to taste
  • 4 large portobello mushrooms, stems removed, wiped clean
  • 4 slices sharp Cheddar cheese

Buns and Toppings

  • 2 hamburger buns
  • Lettuce, sliced tomato, sliced onion, and pickles, as desired
  • Mayonnaise, ketchup, and mustard, as desired

Instructions

  1. Prepare Oil Mixture and Mushrooms: In a small bowl, combine 1/4 cup neutral oil with 1 teaspoon onion powder, then season with salt and black pepper to taste. Score the top surface of each portobello mushroom with an X pattern to allow flavors to penetrate. Coat the mushrooms thoroughly with the oil and seasoning mixture.
  2. Cook Mushrooms in Skillet: Heat a large cast-iron skillet over medium-high heat. Place the mushrooms in the skillet and then place a second heavy skillet on top of the mushrooms, wrapping it in foil for easier cleanup. Flip the mushrooms every two minutes and press down firmly on the top skillet once the mushrooms have flattened (after about 4 minutes), to encourage browning. Continue flipping and pressing the mushrooms for 8 to 10 minutes or until they become thin and browned. Reduce heat if mushrooms start to char, and add additional oil if they become dry or wrinkly.
  3. Melt Cheese and Assemble Burgers: Lower the heat to low. Place a slice of sharp Cheddar cheese on each mushroom, then cover the skillet with a lid or an inverted sheet pan to help the cheese melt, about 1 to 2 minutes. Toast the hamburger buns if desired. Place two cheese-topped mushroom patties on each bun and add preferred toppings such as lettuce, tomato, onion, pickles, and condiments like mayonnaise, ketchup, and mustard. Serve immediately.

Notes

  • Use a heavy skillet to apply even pressure when smashing the mushrooms, which helps achieve a burger-like texture.
  • Scoring the mushrooms before cooking allows the oil and seasoning to absorb better.
  • Adjust cooking time slightly depending on the thickness of the mushrooms and heat of your stove.
  • For extra flavor, you can add garlic powder or smoked paprika to the oil mixture.
  • To make this recipe vegan, substitute the Cheddar cheese with a plant-based cheese and use vegan buns and condiments.

Keywords: mushroom burger, portobello burger, vegetarian burger, smashed mushroom burger, mushroom smash burger recipe, easy vegetarian burgers

Find it online: https://flavorsbymaya.com/mushroom-smash-burgers-recipe/