Cast-Iron Mushrooms
Peer reviewed by UK recipe editorsAuthored by UK recipe editorsOriginally published 28 Jan 2026
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These roasted cast-iron mushrooms are a celebration of earthy flavours and contrasting textures. By using a variety of fungi, including chestnut, king oyster, and portobello, you create a sophisticated vegetarian side dish that is far more than the sum of its parts. The secret lies in a screamingly hot frying pan, which ensures the mushrooms sear and caramelise rather than steam, resulting in a meaty, concentrated flavour that pairs perfectly with almost any main course.
This simple vegetable dish is ideal for a relaxed dinner party or a comforting Sunday roast alternative. The addition of paper-thin shallots, golden butter, and aromatic garlic during the final stages of cooking adds a larder-fresh richness. Low in fat but high in savoury satisfaction, these mushrooms are best served straight from the oven while they are still sizzling and fragrant with fresh parsley.
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Ingredients for Cast-Iron Mushrooms
230g crimini mushrooms
230g white button mushrooms
230g oyster mushrooms
2 king oyster mushrooms
1 portobello mushroom
2 shallots, sliced paper thin
1 tablespoon butter or margarine
2 cloves garlic, minced
2 tablespoons parsley, chopped
Sea salt and pepper to taste
How to make Cast-Iron Mushrooms
Back to contentsPlace your trusty cast-iron skillet in the middle of your oven and preheat to 500 degrees. This will take thirty minutes.
Prepare the mushrooms. With a damp towel wipe off any dirt. If you must rinse them, do so gently and pat dry.
Create various shroom shapes. Slice crimini and button mushrooms in half. Remove the bottom tuft of the king oyster mushrooms and discard, then slice lengthwise into four or five long pieces before cutting down the middle so you have short rectangles. Rip the oyster mushrooms into halves by hand. Slice the portobello into quarters or eighths as desired.
Remove the pan and add all the mushrooms. Return it to the oven for five minutes. Then remove again, and stir the shrooms so that any sides unexposed to the hot iron can't help getting a good sear. Cook for an additional five minutes.
Remove the pan and add the shallots, butter, and toss. Return to the oven for another five minutes.
Final removal: add the garlic and parsley. Let sizzle in front of your drooling friends for three to five minutes. Salt generously, pepper profusely, and signal the attack.
Disclaimer
While every effort has been made to ensure the information is accurate and up to date, individual needs may vary and dietary requirements can differ based on personal health conditions. Always check food labels and allergen information before preparing or consuming any recipe. If you have specific health concerns, allergies, intolerances, or are following a medically prescribed diet, seek advice from your GP, pharmacist, or a registered dietitian before making significant changes to your diet or lifestyle.
Article history
The information on this page is peer reviewed by qualified clinicians.
28 Jan 2026 | Originally published
Authored by:
UK recipe editors
Peer reviewed by
UK recipe editors

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