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Ingredients
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Mushrooms
Spinach-Parmesan Filling
Garnish & Finish
Method
Mushrooms
- 1
Prepare mushrooms
Preheat oven to 375°F (190°C). Wipe mushroom caps clean with a damp paper towel. Gently remove stems and, if desired, reserve the stems for another use. Place caps cavity-up on a baking sheet lined with parchment or lightly oiled.
- 2
Brush the outside and inside of each mushroom cap lightly with 1 tablespoon olive oil. Season the inside of the caps with 1 teaspoon salt and 1/2 teaspoon black pepper. Set aside while you make the filling.
- 3
If mushroom caps are very wet after cleaning, pat dry to prevent soggy shells during baking.
Spinach-Parmesan Filling
- 4
Cook spinach and aromatics
Heat 1 tablespoon olive oil and 1 tablespoon unsalted butter in a large skillet over medium heat. Add 1/4 cup finely diced onion and cook until translucent, about 3–4 minutes. Add 2 minced garlic cloves and cook until fragrant, about 30 seconds.
- 5
Add 8 oz packed fresh baby spinach in batches, stirring until wilted before adding more, about 2–3 minutes total. Remove skillet from heat and transfer wilted spinach and aromatics to a fine mesh sieve or bowl. If using a sieve, press gently with the back of a spoon to remove excess liquid; if using a bowl, let cool slightly and squeeze out moisture with clean kitchen towel or paper towels until filling is only slightly damp. Proper draining prevents a soggy filling.
- 6
Combine filling ingredients
Chop the drained spinach finely and return to a mixing bowl. Add 4 oz softened cream cheese, 1/4 cup ricotta, 3/4 cup grated Parmesan, 1 large egg, 1/2 teaspoon salt, 1/4 teaspoon black pepper, and 1/8 teaspoon freshly grated nutmeg (optional). Stir until smooth and well combined. Taste and adjust seasoning, adding 1/8 teaspoon red pepper flakes if you want a hint of heat.
- 7
If the filling seems too loose, add up to 1–2 tablespoons additional grated Parmesan or a tablespoon of breadcrumbs to help bind; if too dry, stir in 1 tablespoon ricotta or cream to reach a scoopable consistency.
Assemble & Bake
- 8
Stuff mushrooms
Using a small spoon or a piping bag, mound about 1 to 1 1/2 teaspoons (approximately 1 tablespoon) of the spinach-Parmesan filling into each prepared mushroom cap, slightly overfilling so the top is rounded. Arrange the stuffed mushrooms evenly on the baking sheet.
- 9
Sprinkle the tops lightly with 1/4 cup extra grated Parmesan. If using, add a small pinch of shredded mozzarella to each for a melty top.
- 10
- 11
Optional finish: For a lightly crisped top, switch the oven to broil for 1–2 minutes, watching carefully to avoid burning.
Garnish & Serve
- 12
Remove mushrooms from oven and let rest for 3–4 minutes. Sprinkle with 2 tablespoons chopped fresh parsley and 1/2 teaspoon lemon zest, if using, for brightness.
- 13
Serve warm on a platter. These are best eaten the day they are made but can be held warm on a low oven setting (200°F / 95°C) for up to 30 minutes.
