Stuffed Portobello Mushrooms | Basic Recipe
Basic stuffed Portobello mushrooms are big, meaty mushroom caps filled with a quick sauté of their own chopped stems, onion, garlic and fresh herbs, then baked until tender. It is a healthy vegan side dish that comes together with pantry staples and just a few minutes of hands-on work, which is exactly why I keep coming back to it.
Stuffed Portobello mushrooms are a personal favorite of mine because they consistently deliver a satisfying, fuss-free result. I treat this recipe as a blank canvas more than a fixed formula. Personally, I am eager to experiment with a spinach filling, complemented by a wine-infused white sauce, but the basic version below is the one I rely on when I want something dependable on the table.
What goes into the filling
The beauty of this recipe is that the filling is built mostly from the mushrooms themselves. You remove and chop the Portobello stems, then sauté them with onion, mashed garlic, ground coriander and thyme so nothing goes to waste. Fresh dill and parsley are stirred in off the heat to keep them bright, and a sliced red bell pepper goes on top for color and a little sweetness. Olive oil carries the flavor; if you are lacto-vegetarian and prefer it, the card notes you can use a little butter instead.
Tips for getting them right
Pick large, firm caps with tightly closed gills and no slimy spots, and clean them with a damp cloth rather than soaking them, since mushrooms absorb water quickly and turn soggy. When you sauté the stems and onion, give them the full five minutes so the onion softens and the raw bite mellows before you add the herbs. Stir the dill and parsley in only after you pull the pan off the heat, which protects their fresh flavor and color. If you are new to cooking mushrooms in general, my guide on how to cook mushrooms covers the basics that make every mushroom dish better.
Why covering the tray works
Portobellos hold a lot of water, so baking them covered with aluminum foil at 375 F traps steam and lets the caps cook through gently without drying out the filling. The foil essentially steam-roasts them, which is what gives you that tender, juicy texture rather than rubbery, shriveled mushrooms. After about 30 minutes they should be soft when pierced and releasing their juices, which is your cue that they are done.
What to serve them with, plus storage
These work best as a side dish or a light main alongside something starchy and grounding. I love them next to a creamy mushroom polenta for a double dose of mushroom flavor, or as part of a spread with other baked vegetables like stuffed peppers and stuffed zucchini boats. If you enjoy this style of cooking, my collection of stuffed vegetable recipes has plenty more to explore.
Leftovers keep well in an airtight container in the fridge for up to 3 days. Reheat them in a covered dish in the oven so they stay moist; the microwave works in a pinch but can soften the caps further. I would not freeze them, as the high water content makes the texture watery once thawed.
If you make these, I would love to know how they turned out. Rate the recipe below and leave a comment with the filling you used or any twist you tried, especially if you beat me to that spinach-and-white-sauce version I keep talking about.
Summarise & Save This Recipe
★ Add us as a trusted Google source
Basic Stuffed Portobello Mushrooms
Ingredients
- 12 Portobello mushrooms large, stems removed and chopped
- 1 red bell pepper sliced
- 1 onion chopped
- 1 bunch dill
- 1 bunch parsley
- 6 cloves garlic mashed
- ½ tsp ground coriander
- 2 tsps thyme
- 2 Tbsps olive oil for lacto-vegetarians – you can use some butter
- ground pepper to taste
- salt to taste
Instructions
- Heat the oil/butter in a saucepan.
- Add chopped mushrooms stems, mashed garlic cloves, chopped onion, pepper, salt, coriander and thyme. Sauté for 5 minutes.
- Remove from heat and add chopped dill and parsley.
- Preheat the oven at 375° F.
- Place the mushrooms in an oven tray.
- Add about 1-1 1/2 tbsp of stuffing / mushroom.
- Garnish with red bell pepper slices.
- Cover the tray with aluminum foil.
- Cook for about 30 minutes.
Frequently Asked Questions
Large Portobello mushrooms are ideal because their wide, sturdy caps hold a generous amount of filling and develop a meaty texture when baked. This recipe uses 12 large Portobellos with the stems removed and chopped so they go into the filling. Look for firm caps with no slimy or shriveled spots.
Yes, as written the recipe is vegan because the filling is built from mushrooms, onion, garlic, bell pepper, fresh herbs and olive oil. The card notes that lacto-vegetarians can swap the olive oil for a little butter if they prefer, but the default version contains no animal products.
No, the caps go into the oven raw and bake through under foil. Only the filling is cooked first: you sauté the chopped stems, onion, garlic and spices for about 5 minutes, then stir in the fresh dill and parsley off the heat before spooning it into the raw caps.
Covering the tray with aluminum foil traps steam, which cooks the water-rich Portobellos gently and keeps both the caps and the filling moist. Without the foil the mushrooms can dry out and shrivel. Bake them at 375 F for about 30 minutes, until the caps are tender and releasing their juices.
Keep leftover stuffed mushrooms in an airtight container in the fridge for up to 3 days. Reheat them in a covered dish in the oven so they stay moist; the microwave works in a pinch but softens the caps more. Freezing is not recommended because the high water content makes the texture watery once thawed.
Absolutely, this basic filling is a great canvas for variations such as adding spinach or other vegetables you like. You can sauté the filling ahead of time and refrigerate it, then stuff and bake the mushrooms when you are ready to serve, which keeps the texture best.
Great recipe! So easy
I love mushrooms and your recipe is just great. I will try it with other stuffings too!
Glad you liked the recipe! 🙂
Great!
Those look so wonderful! Love stuffed mushrooms 🙂
oo I LOVE stuffed portobello mushrooms! They always make me think of summer because I usually make them like crazy for bbqs!
@barbecue: Yes I love their meaty texture! They go great with shredded cheese on top also! But what do you mean 'where's my recipe?' it's right above 🙂
i love this mushrooms its like eating a steak.but where s your recipe? i like to cut mushrooms up and sautee them in butter and do the same with onions then i add some parmesan cheese/.
Thanks Raquel! I'm glad I found someone that loves mushrooms as much as I do 😀
Too sad for people not being able to cook. Maybe they just don't find it necessary and have no to motivation to do it. I learned to cook out of curiosity and being hungry waiting for my mom to get home to cook for me. Now I have a purpose why I cook… my family. I am a mushroom fanatic and may eat anything that is edible mushroom. I love your dish easy, quick and healthy. Great photos! It got me drooling =)