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Preheat your oven to 375°F (190°C). Line a baking sheet with parchment paper for easy cleanup.

Carefully wipe the mushroom caps clean with a damp cloth. Gently twist or pull out the stems from each mushroom cap. Finely chop the mushroom stems and set aside. Arrange the mushroom caps gill-side up on the prepared baking sheet. Drizzle them with 1 tablespoon of olive oil and season lightly with 1/4 teaspoon salt and 1/8 teaspoon black pepper.

Heat 1 tablespoon of olive oil in a large skillet over medium heat. Add the finely diced yellow onion and cook until softened, about 3-4 minutes. Add the minced garlic and chopped mushroom stems, cooking for another 3-5 minutes until the stems have softened and released their moisture.

Pour in the dry white wine (or vegetable broth) and scrape up any browned bits from the bottom of the skillet. Cook until the liquid has mostly evaporated, about 1-2 minutes.

Remove the skillet from the heat. Stir in the panko breadcrumbs, grated Parmesan cheese, chopped fresh parsley, chopped fresh thyme, 1/4 teaspoon salt, and 1/8 teaspoon black pepper. Mix well until all ingredients are combined and the mixture is moist.

Evenly spoon the filling mixture into each mushroom cap, mounding it slightly. Place the stuffed mushroom caps back on the baking sheet.
Bake for 15 minutes. Then, sprinkle the shredded mozzarella cheese over the top of each mushroom cap boat. Return to the oven and bake for an additional 5 minutes, or until the cheese is melted and bubbly and the mushrooms are tender.

Carefully remove from the oven and let cool for a few minutes before serving. These are delicious served warm as an appetizer or a side dish.


Preheat your oven to 375°F (190°C). Line a baking sheet with parchment paper for easy cleanup.

Carefully wipe the mushroom caps clean with a damp cloth. Gently twist or pull out the stems from each mushroom cap. Finely chop the mushroom stems and set aside. Arrange the mushroom caps gill-side up on the prepared baking sheet. Drizzle them with 1 tablespoon of olive oil and season lightly with 1/4 teaspoon salt and 1/8 teaspoon black pepper.

Heat 1 tablespoon of olive oil in a large skillet over medium heat. Add the finely diced yellow onion and cook until softened, about 3-4 minutes. Add the minced garlic and chopped mushroom stems, cooking for another 3-5 minutes until the stems have softened and released their moisture.

Pour in the dry white wine (or vegetable broth) and scrape up any browned bits from the bottom of the skillet. Cook until the liquid has mostly evaporated, about 1-2 minutes.

Remove the skillet from the heat. Stir in the panko breadcrumbs, grated Parmesan cheese, chopped fresh parsley, chopped fresh thyme, 1/4 teaspoon salt, and 1/8 teaspoon black pepper. Mix well until all ingredients are combined and the mixture is moist.

Evenly spoon the filling mixture into each mushroom cap, mounding it slightly. Place the stuffed mushroom caps back on the baking sheet.
Bake for 15 minutes. Then, sprinkle the shredded mozzarella cheese over the top of each mushroom cap boat. Return to the oven and bake for an additional 5 minutes, or until the cheese is melted and bubbly and the mushrooms are tender.

Carefully remove from the oven and let cool for a few minutes before serving. These are delicious served warm as an appetizer or a side dish.
