A quick and easy portobello mushroom recipe! These easy roasted portobello mushroom caps are perfect on a roasted veggie sandwich or as a busy weeknight side dish. Ready in just 20 minutes!

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Maybe it is the colder weather, but I am obsessed with roasting vegetables. Roasting can hide a multitude of sins and is perfect for out-of-season vegetables. From slow roasted tomatoes and roasted watermelon radishes, I am roasting up serious goodness!
📖Why My Recipe Works
- My method for roasting portobellos is tried and true. Easy prep, and the recipe cooks quickly without the rubberiness or excess water.
- Endless flavor variations. See below for how to use everything from fresh herbs to spicy Cajun seasoning on
Portobello Mushroom Recipe Variations
- Balsamic and Thyme- Drizzle on 1 tablespoon balsamic vinegar and sprinkle with thinly sliced garlic and 1 tablespoon (total) fresh thyme leaves before baking.
- Garlic Butter- Replace the EVOO with my homemade garlic butter.
- Harissa- Sprinkle on harissa seasoning in place of the pepper for a spicy kick.
- Cajun- Replace the oil with Cajun butter.
- Spicy Southwest- Sprinkle on a mixture of 1 teaspoon each of chili powder, cumin, and garlic powder plus a healthy pinch of crushed red pepper flakes.
- Soy-Glazed- Replace the EVOO with a mixture of 1 tablespoon tamari (gluten-free soy sauce), 1 teaspoon honey, and 1 teaspoon sesame oil.
- Parmesan and Herb- Sprinkle on 1 tablespoon of minced herbs (I like thyme and rosemary) and top with freshly grated parmesan cheese as soon as the mushroom caps are removed from the oven.
⏲️How to Roast Portobello Mushrooms
- To prep the mushrooms for baking you will need to remove the stem. Then take a dull spoon and carefully scrape out the gills.
- To prep the mushrooms for baking you will need to remove the stem. Then take a dull spoon and carefully scrape out the gills.
- Spread out the mushrooms on the baking sheet and lightly oil both sides. Sprinkle with salt and black pepper.
- Roast in a 400 F degree oven for 15 to 20 minutes. Flip halfway through for even caramelization. Slice the mushrooms into ½ inch slices, if desired, and serve or use in your recipe.
👩🏻🍳 Expert Tip
Space the mushrooms apart to ensure they roast rather than steam.
🥗How to Served Roasted Mushrooms
A few ways to use mushrooms include serving with roasted zucchini and roasted eggplant then top with romesco sauce, feta (optional), toasted pine nuts, and fresh parsley for a complete meal.
For a quick and easy dinner toss with pasta and San Marzano tomato sauce.
Serve with my almond flour chicken piccata or gluten-free alfredo.
These mushrooms have a meaty texture so you can also use them as the star of the show.
Try serving them sliced as a main course, just as you would a steak with chimichurri or dairy-free pesto.
More Mushroom Recipes
Frequently Asked Questions
How to Store Fresh portobello Mushrooms
portobello mushrooms kept in the refrigerator should be used within a week. Remove mushrooms from any plastic wrapping, which can trap moisture.
Instead, place fresh portobello mushrooms in paper bags or wrap them in a paper towel and place in an open plastic bag for storage in the refrigerator.
How to Clean Mushrooms
I place the mushrooms in a colander and rinse with cool water. Then use a clean towel to dry and rub off any remaining dirt.
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📖 Recipe Card
Roasted Portobello Mushrooms
Ingredients
- 4 portobello mushroom caps
- 2 Tablespoons olive oil
- ⅓ teaspoon kosher salt
- ¼ teaspoon black pepper
Instructions
- Preheat your oven to 400 F degrees. Line a baking sheet with parchment paper (optional).
- Remove the stems from the mushrooms. Using a spoon, carefully scrape out the gills.4 portobello mushroom caps
- Brush each side of the mushrooms with oil and lightly sprinkle with salt and pepper.2 Tablespoons olive oil, ⅓ teaspoon kosher salt, ¼ teaspoon black pepper
- Bake for 15 to 20 minutes until tender. Flip halfway through baking. Slice mushrooms in ½ inch slices (optional)
Video
Notes
- See post for recipe variations
- Properly stored in an airtight container, cooked mushrooms will last for 3 to 5 days in the refrigerator.
Equipment
- Parchment Paper optional
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