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  1. Food and Cooking
  2. Recipes
  3. Stuffed Portobello Mushrooms

Stuffed Portobello Mushrooms

These make an excellent light dinner or summer side dish!

By Leah PerezPublished: Jun 3, 2025
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the pioneer woman's stuffed portobello mushrooms
C.W. Newell
Yields:
6 serving(s)
Prep Time:
30 mins
Total Time:
1 hr 15 mins
the pioneer woman's stuffed portobello mushrooms

If you love caprese salad, then these stuffed portobello mushrooms will quickly become one of your new favorite summer recipes. Each mushroom cap is filled with sweet cherry tomatoes, creamy mozzarella, fragrant basil, and a drizzle of tangy balsamic glaze. And of course, no stuffed food recipes are complete without a bit of crunch—be sure to sprinkle the mushrooms with plenty of golden, parmesan-panko breadcrumbs for the perfect crispy finish. Beyond the filling, what makes these mushrooms even more special is a quick turn in a garlicky balsamic marinade that infuses the mushrooms with deep, savory flavor before they’re even roasted. Easy, elegant, and bursting with the tastes of summer, these stuffed mushrooms are hearty enough to stand on their own as a vegetarian main, but also perfect as a crowd-pleasing starter for your next backyard dinner. Find even more mushroom recipes to fall in love with here.

How do you pick out portobello mushrooms?

Look for mushrooms that are firm to the touch, with smooth, unbroken caps that are at least the size of your palm. A round cap not only looks great when stuffed but also makes for easier prep and even cooking.

How do you clean and prepare portobello mushrooms for cooking?

Start by removing the stems, then gently wipe the caps with a damp paper towel to get rid of any dirt. Next, use a spoon or a small paring knife to carefully scrape out the dark gills from the underside of the caps. This extra step goes a long way, as gills can add a muddy flavor and make the mushrooms soggy when cooked. Plus, it leaves more room for the tasty stuffing!

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Ingredients

  • 6

    large portobello mushroom caps (about 1 1/4 pounds)

  • 2

    garlic cloves, finely chopped

  • 2 Tbsp.

    balsamic glaze, plus more for drizzling

  • 6 Tbsp.

    olive oil

  • 3/4 tsp.

    kosher salt

  • 3/4 tsp.

    black pepper

  • 1 cup

    cherry tomatoes (about 6 ounces), halved

  • 4 oz.

    fresh mozzarella, cubed (about 3/4 cup)

  • 1/4 tsp.

    Italian seasoning

  • 1/4 cup

    panko breadcrumbs

  • 1/4 cup

    grated parmesan cheese (about 1 ounce)

  • Fresh basil leaves, for serving

Directions

    1. Step 1Clean the mushroom caps by wiping away any dirt and cutting off any remaining stem with a paring knife. Scrape off the gills on the underside of each cap with a small round spoon.
    2. Step 2In a shallow dish, whisk together the garlic, balsamic glaze, 4 tablespoons of the oil, and ½ teaspoon each salt and pepper. Add the mushroom caps and turn to coat. Allow to sit in the marinade for at least 15 minutes and up to 1 hour.
    3. Step 3Preheat the oven to 425°F. Line a baking sheet with parchment paper.
    4. Step 4Place the mushrooms on the baking sheet stem-side down. Roast for 10 minutes, then flip. Continue roasting until tender, 5 to 10 minutes more.
    5. Step 5Meanwhile, in a medium bowl, toss together the tomatoes, mozzarella, Italian seasoning, 1 tablespoon of the oil, and the remaining ¼ teaspoon each salt and pepper. In a small bowl, stir together the panko and parmesan with the remaining 1 tablespoon oil.
    6. Step 6Divide the tomato and mozzarella mixture among the mushroom caps and sprinkle with the panko mixture.
    7. Step 7Return the mushrooms to the oven and bake until the cheese is melted and the topping is golden, about 15 minutes more.
    8. Step 8Serve topped with some basil and a drizzle of balsamic glaze.
Love This Recipe? Try One Of These Next!
  • Crab-Stuffed Mushrooms
  • French Onion Soup Stuffed Mushrooms
  • Portobello Mushroom Burgers
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