Thick portobello caps sear until deeply browned, then take a glossy garlic-thyme butter baste with a splash of balsamic vinegar.
Broad portobello caps give Mushroom Steak a substantial bite and enough surface area for a dark sear. Cooking them before adding the butter lets their moisture escape, so the finish tastes roasted rather than watery.
Choose firm caps of similar size and pat them dry after cleaning. A heavy skillet helps keep the heat steady; leave the mushrooms undisturbed long enough to develop color.
Method
Pat the portobello mushrooms dry and season both sides with salt and black pepper. Heat olive oil in a 12-inch heavy skillet over medium-high heat.
Lay the caps gill-side up in a single layer. Sear for without moving, then turn and cook for until browned and releasing their juices.
Reduce the heat to medium-low and cook for , turning once, until tender through the thickest part and most of the liquid has evaporated.
Add butter, garlic and thyme and baste for until fragrant. Add balsamic vinegar and turn the mushrooms for until glossy; scatter with parsley.
Forkue tips
- If four caps will not fit flat, sear them in two batches and add about 10 minutes to the cooking time.
Storing and reheating
Refrigerate for 3 days. Reheat in a skillet over medium heat until hot, letting any released moisture evaporate before adding a small knob of butter.
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Kitchen gear
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Mushroom Steak: FAQ
Can I make these vegan?
Yes. Replace the butter with olive oil or a plant-based butter; the browned mushroom surface still provides plenty of savory flavor.
What should I serve alongside?
Mashed potatoes and white beans make a substantial plate. A green salad adds freshness against the rich garlic butter.
How do I store and reheat Mushroom Steak?
Refrigerate for 3 days. Reheat in a skillet over medium heat until hot, letting any released moisture evaporate before adding a small knob of butter.
How long does Mushroom Steak take?
About 28 min in total: 10 min prep and 18 min cooking.
What do I need to make Mushroom Steak?
The key ingredients are portobello mushrooms, butter, garlic, thyme, balsamic vinegar and parsley, plus pantry basics.
Any tips for Mushroom Steak?
If four caps will not fit flat, sear them in two batches and add about 10 minutes to the cooking time.
