Recipe

Filled Portobello Mushrooms

Cheesy spinach-stuffed portobellos with a crisp breadcrumb topping, bright lemon, and big savory flavor.

By Matt Campbell

•

4.8

A single baked portobello mushroom cap stuffed with creamy spinach and cheese, topped with golden breadcrumbs, on a white plate with a fork on a warm-toned kitchen table

Portobello mushrooms are basically nature’s dinner bowls. They are meaty, roasty, and they soak up flavor like they have a little grudge against bland food. This version gets filled with a creamy, garlicky spinach and cheese situation, then finished with crisp, toasty breadcrumbs for that “wait, what is that crunch?” moment.

It looks restaurant-y, but it is secretly low-drama: sauté, stir, fill, bake. You can serve these as a main with a salad and bread, or as a side next to chicken, steak, or whatever you have going on. Either way, do not skip the lemon at the end. That little pop wakes the whole thing up.

Whole portobello mushroom caps, fresh spinach, cream cheese, parmesan, mozzarella, garlic, lemon, and breadcrumbs arranged on a clean kitchen counter under soft natural light

Why It Works

Big savory payoff with simple ingredients: Portobellos bring a deep, umami flavor that tastes like you worked harder than you did.
Creamy filling, crisp top: Soft, cheesy spinach inside plus golden breadcrumbs on top hits that perfect texture contrast.
No soggy mushrooms: A quick pre-bake and pouring off the liquid helps keep the caps sturdy instead of watery.
Easy to flex: Add sausage, swap cheeses, go gluten-free, or make them mini with baby bellas.

Pairs Well With

Storage Tips

Refrigerate: Store cooled stuffed mushrooms in an airtight container for up to 3 days.

Reheat: For the best texture, reheat on a sheet pan at 375°F for 10 to 15 minutes until hot. The microwave works in a pinch, but the topping will soften.

Make ahead: You can prep the filling up to 2 days ahead. Stuff right before baking, or stuff and refrigerate (covered) for up to 24 hours, then bake when ready.

Freezing: I do not love freezing these. Mushrooms release water and the filling can turn a little grainy. If you must, freeze after baking, then reheat from frozen at 375°F until hot, expecting a softer texture.

Common Questions

Do I need to remove the gills?

It is not mandatory, but I recommend it. Scraping out the dark gills with a spoon makes more room for filling and helps keep the filling from turning dark. The pre-bake and draining step is what really helps with wateriness.

How do I keep stuffed portobellos from getting watery?

Three things help a lot: scrape the gills (mostly for space and color), pre-bake the caps and pour off the liquid, and salt lightly (too much salt too early pulls water out). Also, cook the spinach until it is fairly dry before mixing it into the cheese. If it still looks wet, squeeze it gently in a clean towel or paper towels before mixing.

Can I make these without cream cheese?

Yep. Swap in 1/2 cup ricotta (drain it if it is wet) or 1/2 cup mascarpone. If you use ricotta, add a little extra Parmesan and a pinch more salt for punch.

What protein can I add?

Cooked crumbled Italian sausage, chopped pepperoni, shredded rotisserie chicken, or cooked chopped bacon all work. Add about 1/2 cup cooked protein to the filling.

Can I grill them instead of baking?

Absolutely. Grill the caps gill-side up over medium heat until they start to soften, then fill and cook over indirect heat with the lid closed until the cheese melts. Breadcrumbs can be a little fussy on the grill, so if the top is not browning, finish them under the broiler for a minute or two.

Matt Campbell

I have always had a huge passion for the culinary arts, people, working as a team, and so on. I wanted to pursue my love for cooking initially at Virginia Commonwealth University with a culinary arts degree; however, I instead decided to apply myself and acquire more practical skills. My end goal is to eventually open my own restaurant or similar establishment.

Kitchen Essentials

Rimmed baking sheet
Parchment paper or foil (optional, for easy cleanup)
Large skillet
Mixing bowl
Spoon (for scraping gills and filling)
Microplane or fine grater (for Parmesan and lemon zest)

The first time I made stuffed portobellos at home, I was trying to do “restaurant food” on a weeknight with exactly zero restaurant-level patience. I learned fast that the mushroom is doing most of the work for you. Give it garlic, give it cheese, give it something crunchy on top, and it comes out of the oven acting like it paid rent.

Now it is one of my favorite moves when I want dinner to feel a little special without turning my kitchen into a disaster zone. Also, I have absolutely eaten one standing over the sink while the rest “cool for five minutes.” Highly recommend.

A cook’s hands spooning creamy spinach and cheese filling into roasted portobello mushroom caps on a parchment-lined baking sheet on a home kitchen counter

Filled Portobello Mushrooms

(4.8 Reviews)

Prep Time 15 minutes

Cook Time 25 minutes

Total Time 40 minutes

Servings 4 (1 stuffed mushroom each)

Ingredients

For the mushrooms

4 large portobello mushroom caps (about 4 to 5 inches wide), stems removed
2 tablespoons olive oil, divided
1/2 teaspoon kosher salt, plus more to taste
1/4 teaspoon black pepper
1 teaspoon balsamic vinegar (optional, but great)

For the filling

2 tablespoons unsalted butter
3 cloves garlic, minced
5 ounces fresh spinach
4 ounces cream cheese, softened
1/2 cup shredded mozzarella
1/3 cup finely grated Parmesan, plus more for serving
1/4 teaspoon crushed red pepper flakes (optional)
1 teaspoon lemon zest
1 tablespoon lemon juice (to finish)

For the crisp topping

1/3 cup panko breadcrumbs
1 tablespoon olive oil
1 tablespoon chopped fresh parsley (optional)

Instructions

Heat the oven. Preheat to 425°F. Line a rimmed baking sheet with parchment or foil if you want easy cleanup.
Prep the portobellos. Wipe mushrooms clean with a damp paper towel (a quick rinse is fine too, just dry well). Use a spoon to gently scrape out the dark gills (optional but recommended). Brush the inside and outside of the caps with 1 tablespoon olive oil, then season with salt and pepper. If using balsamic vinegar, add just a few drops (about 1/4 teaspoon per cap) inside each mushroom.
Pre-bake to avoid sogginess. Place mushrooms gill-side up on the baking sheet and bake for 8 minutes. Pull the pan out and, using tongs, carefully tip any hot liquid out of the caps into the sink.
Sauté the spinach. While the mushrooms pre-bake, melt butter in a large skillet over medium heat. Add garlic and cook for 30 seconds until fragrant (do not let it brown). Add spinach and cook until fully wilted. Keep cooking another 1 to 2 minutes to drive off moisture, then remove from heat. If the spinach still looks wet, squeeze it gently in paper towels before mixing.
Mix the filling. In a bowl, stir together cream cheese, mozzarella, Parmesan, red pepper flakes (if using), and lemon zest. Stir in the cooked spinach mixture. Taste and adjust salt and pepper.
Stuff the mushrooms. Divide filling between the caps, mounding it slightly. In a small bowl, toss panko with 1 tablespoon olive oil and parsley (if using). Sprinkle evenly over the tops.
Bake until hot and golden. Return to the oven and bake for 12 to 15 minutes, until the mushrooms are tender but not collapsed, the filling is hot throughout, and the topping is golden. If you want extra browning, broil for 1 to 2 minutes at the end, watching closely.
Finish bright. Squeeze a little lemon juice over each mushroom. Shower with extra Parmesan if you are feeling it. Let rest for 5 minutes, then serve.