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Cheeseburger Stuffed Portobello Mushrooms

These Cheeseburger stuffed portobello mushrooms are high in protein, low in carbs, and bursting with juicy, cheesy flavor. They deliver all the satisfaction of a cheeseburger with a drizzle of homemade "fancy sauce" that rivals In-N-Out or Shake Shack. Perfect for a quick, satisfying dinner for two.
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Prep Time 10 minutes
Cook Time 25 minutes
Course Main Course
Cuisine American
Servings 2

Equipment

  • 1 small baking sheet
  • aluminum foil
  • 1 medium mixing bowl

Ingredients
  

For the Burger Meat:

  • 6-8 oz ground beef
  • 1/4 onion diced finely
  • 1 clove garlic grated
  • 1 tablespoon panko
  • 1/4 teaspoon baking powder
  • 1/4 teaspoon salt
  • 1/4 teaspoon black pepper
  • 1/4 teaspoon paprika
  • 1/2 teaspoon parsley chopped
  • 1 teaspoon olive oil
  • 1/2 teaspoon balsamic vinegar
  • 1/4 cup shredded cheddar cheese

For the Stuffed Mushrooms:

  • 2 large portobello mushrooms stems and gills removed
  • Olive oil for brushing
  • 2 slices cheddar cheese or preferred cheese
  • Optional toppings: diced tomatoes shredded lettuce, pickles

For the Fancy Sauce:

  • 3 tablespoons mayonnaise
  • 1 teaspoon Dijon mustard
  • 1 teaspoon ketchup
  • 1/4 teaspoon smoked paprika
  • 1/8 teaspoon onion powder
  • 1 teaspoon pickle brine

Instructions
 

Step 1: Mix the Meat

  • In a small mixing bowl, combine all burger meat ingredients, including the baking powder. Mix gently until just combined. Cover and refrigerate for at least 2 hours or overnight.

Step 2: Prep the Mushrooms

  • Preheat oven to 375°F (190°C). Gently remove the stems and scrape out the gills from the portobello mushrooms using a spoon. Place the mushrooms on a small lined baking sheet, gill side up. Brush with olive oil and lightly season with salt and pepper.

Step 3: Stuff the Mushrooms

  • Divide the burger mixture into two portions. Shape each portion into a patty and press it into the cavity of each mushroom.

Step 4: Bake

  • Bake for 20–25 minutes, or until the internal temperature of the meat reaches 160°F (71°C).

Step 5: Add Cheese

  • Place a slice of cheese on each mushroom and bake for an additional 2–3 minutes, or until the cheese melts.

Step 6: Make the Fancy Sauce

  • While the mushrooms bake, whisk together mayonnaise, Dijon mustard, ketchup, smoked paprika, onion powder, and pickle brine in a small bowl.

Step 7: Garnish and Serve

  • Drizzle the fancy sauce over the baked mushrooms. Top with diced tomatoes, shredded lettuce, or pickles, if desired. Serve hot.
Keyword easy weeknight dinners, high protein meals, low carb recipes, stuffed mushroom recipe