Stuffed Portobello Mushrooms with Spinach and Parmesan

User Reviews

5

147 reviews
Excellent
  • Prep Time

    15 mins

  • Cook Time

    25 mins

  • Total Time

    40 mins

  • Servings

    4 servings

  • Calories

    153 kcal

  • Course

    Side Dish

  • Cuisine

    American

Stuffed Portobello Mushrooms with Spinach and Parmesan

This recipe pairs large portobello mushroom caps with a filling of sautéed spinach, onion, garlic, and grated Parmesan cheese. The mushrooms are broiled until just tender, which helps reduce moisture, then filled and served. The filling combines earthy greens and sharp cheese, offering a rich and savory side or light main dish.

Description

Stuffed Portobello Mushrooms with Spinach and Parmesan start by cleaning and preparing mushroom caps, removing stems and gills to create space for the filling. The caps are sprayed with olive oil, seasoned, and broiled to soften without becoming too watery. Meanwhile, frozen chopped spinach is thoroughly thawed and pressed dry to remove excess liquid. Onions and garlic are sautéed in olive oil, then mixed with the drained spinach and Parmesan cheese to create a flavorful mixture.

The mushrooms are then filled with this savory spinach and cheese blend. Their tender texture contrasts with the filling’s slight meltiness and umami from Parmesan. Broiling allows a gentle cooking and browning that enhances flavor without overcooking.

The dish works well served warm as a vegetarian side dish or light main and pairs nicely with salads or grains.

Placing the oven rack in the center prevents overexposure to heat. Draining the filling ingredients is critical to avoid soggy mushrooms. Leftovers keep up to four days refrigerated and reheat best gently covered at low microwave power. Freezing is not recommended.

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Ingredients

Servings
  • 4 portobello mushrooms
  • olive oil spray
  • 1 teaspoon kosher salt divided; or ½ teaspoon of any other salt, including Morton kosher salt, Diamond Crystal brand
  • ¼ teaspoon black pepper divided
  • 10 ounces spinach frozen, chopped
  • 2 tablespoons olive oil
  • 1 onion small, finely chopped; 6 ounces
  • 1 tablespoon garlic minced, fresh
  • ¼ cup parmesan grated

Instructions

  1. Preheat the broiler, setting the temperature to high (500°F). Set an oven rack in the middle of the oven. Line a broiler-safe, rimmed baking sheet with foil.
  2. Gently wipe the mushrooms clean with a damp paper towel. Twist or cut off the stem of each mushroom. Use a small spoon to scrape out the gills and discard them.
  3. Spray the mushroom caps with olive oil on both sides. Sprinkle them with ½ teaspoon kosher salt and ⅛ teaspoon black pepper. Broil until just tender, about 4 minutes per side. Place them upside down on paper towels to drain.
  4. Meanwhile, defrost the spinach in the microwave according to the directions on the package. Place the defrosted spinach in a colander to drain. Repeatedly press on the spinach with the back of a large spoon to remove as much water as possible.
  5. Heat the olive oil in a large skillet over medium heat. Add the onion and cook it for 5-7 minutes, stirring occasionally, until golden. Add the garlic, spinach, ½ teaspoon of kosher salt, and ⅛ teaspoon of black pepper. Cook, stirring, for 1-2 more minutes. Remove the skillet from the heat and allow it to cool for a couple of minutes, then mix in the parmesan.
  6. Evenly distribute the spinach mixture among the mushrooms. Don't press down on the filling - it's prettier when piled high on top of the mushrooms.
  7. Place the stuffed mushrooms back under the broiler (on the middle rack) for 2-3 minutes until the filling is golden. Serve immediately.

Notes

  • Position the oven rack mid-level to prevent mushrooms from being too close to the heat source.
  • Scrape out mushroom gills to make room for filling and reduce moisture buildup.
  • Press defrosted spinach thoroughly to remove water and avoid soggy filling.
  • Store leftovers in an airtight container with paper towels to absorb moisture and reheat covered at 50% microwave power.
  • Freezing leftovers is not advised due to texture changes.

Nutrition Information

Show Details
Serving 1stuffed mushroom Calories 153kcal (8%) Carbohydrates 13g (4%) Protein 8g (16%) Fat 9g (14%) Sodium 441mg (18%) Fiber 4g (16%) Sugar 2g (4%)

Nutrition Facts

Serving: 4servings

Amount Per Serving

Calories 153 kcal

% Daily Value*

Serving 1stuffed mushroom
Calories 153kcal 8%
Carbohydrates 13g 4%
Protein 8g 16%
Fat 9g 14%
Sodium 441mg 18%
Fiber 4g 16%
Sugar 2g 4%

* Percent Daily Values are based on a 2,000 calorie diet.

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5

147 reviews
Excellent

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