How to Cook King Oyster Mushrooms (2024)

The king trumpet, eryngii or king oyster mushroom is the largest of the oyster mushroom genus and, unlike other oyster mushrooms, their stalks aren’t tough and woody to eat. Instead, they're hailed for their meaty texture and umami flavour. Native to the Mediterranean, they are perhaps most commonly used in Asian cuisines such as Chinese, Japanese and Korean; three countries where the mushroom is cultivated on a large scale.

This impressive mushroom averages between 10–15cm in length, has a long shelf life in the fridge (roughly one week) and doesn’t lose its shape when cooked. The texture is sometimes likened to abalone or scallops, which makes them an interesting option for vegetarians and are often billed as ‘mushroom steaks’ or ‘vegan scallops’.

What to look for when buying king oyster mushrooms

When buying king oysters, you want to select them carefully as they don’t come cheap! Choose mushrooms with firm, unblemished stems. They usually come nicely trimmed and free from dirt or soil but if you do notice any dirt, gently brush it off instead of washing them. The caps are quite delicate so be sure to select unbroken ones if you’re after beautiful presentation.

If you are eating the mushrooms raw and finely sliced, select smaller mushrooms as they are said to be slightly stronger in flavour. Once cooked however, the mushroom's natural umami flavour is unleashed, so size doesn't matter – go as big or as small as you like.

Ingredients

Metric

Imperial

  • 2 king oyster mushrooms
  • olive oil
  • 40g of unsalted butter, cubed
  • 1 sprig of thyme, (optional)
  • 1 garlic clove, bashed (optional)
  • flaky sea salt

1

Carefully slice the mushrooms in half lengthways. Lightly score a 5mm diagonal crisscross pattern into the cut side of the mushrooms. This will help the mushroom cook more evenly as well as allowing the seasoning to thoroughly penetrate the flesh

2

Place a pan over a high heat. Once the pan is almost smoking, add a drizzle of oil and the mushrooms cut-side down. Turn the heat down to medium-high

3

Cook for 3–5 minutes depending on the size of the mushroom, until they turn a nice golden colour

5

Turn the mushrooms over and baste with the foaming butter until they are cooked all the way through

6

Drain on kitchen roll, sprinkle with flaky sea salt and serve hot

Pan-fried king oysters basted in plenty of butter

'vegan scallops'

What king oyster mushrooms go with

The mild taste of king oyster mushrooms means they are great at taking on strong flavours such as soy sauce or garlic. That's why Matt Gillan pairs pan-fried slices of the mushroom with a rich soy sauce gel and a spoonful of umami-packed mushroom and Parmesan orzo. In another dish, he serves them with the adventurous flavours of truffle, a blue cheese crumble and a sharp cherry vinegar gel.

If you want to celebrate the umami flavour of the mushroom itself, simply cook some in foaming butter and finish with chopped soft herbs, a squeeze of lemon and a generous sprinkle of crunchy sea salt. Serve with eggs for a luxurious veggie fry-up.

Japanese cooks are particularly fond of king oyster mushrooms – you’ll find them fried in crispy tempura batter served with dipping salts and sauces, or skewered whole and grilled and glazed yakitori-style across the country.

The mushroom's robust shape and texture also makes them fun to experiment with; Ollie Dabbous serves them raw and sliced very finely for a fresh flavour and crisp texture in his dish of Warm veal rillettes, mushroom shavings and pickled garlic buds. A popular vegan dish sees the stems thickly sliced into ‘scallops’ and pan-fried in good quality oil until cooked through. Sprinkle with seaweed powder for an extra taste of the sea.

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How to Cook King Oyster Mushrooms (2024)

FAQs

What part of king oyster mushrooms do you eat? ›

Unlike many mushrooms, whose stems become tough and woody, king oyster mushroom stems are firm and dense but completely edible. Indeed, slicing the stems into rounds and sautéeing them yields something resembling sea scallops in texture and appearance, which is why they're sometimes referred to as "vegan scallops."

How do you prepare oyster mushrooms to eat? ›

The best way to cook oyster mushrooms:

Searing oyster mushrooms quickly over medium-high heat is the best method I've found to cook them. They develop an irresistibly tasty crust, almost as if they were dipped in batter. I use the same method to prepare a simple shiitake mushroom recipe.

Do you need to peel king oyster mushrooms? ›

Only the super hard ends should be removed and all the remaining parts is edible. King oyster mushrooms can be used in pan frying, soups, salad. It can be sliced as thin pieces or cut like abalone flower cutting.

How do you make king oyster mushrooms not rubbery? ›

You can slice the thick stems into rounds or slices, score them, and sear them in a hot pan, use in a stir fry recipe or roast them in the oven. This helps prevent their texture from becoming rubbery and allows their flavor to be released. You can also make king oyster mushroom skewers and serve them as a side dish.

Should you wash king oyster mushrooms before cooking? ›

When buying king oysters, you want to select them carefully as they don't come cheap! Choose mushrooms with firm, unblemished stems. They usually come nicely trimmed and free from dirt or soil but if you do notice any dirt, gently brush it off instead of washing them.

How do you know when king oyster mushrooms are cooked? ›

The cooked side should be golden and slightly crispy around the edges. Continue to cook the mushrooms for another 5-10 minutes on medium heat until the mushrooms are tender and both sides are golden.

Are you supposed to eat oyster mushroom stems? ›

Get ready to relish the full mushroom experience! The stems of white button, crimini, portabella, oyster, and king oyster mushrooms are entirely edible and bursting with savoury goodness. These tasty stems add texture and depth to your dishes, allowing you to enjoy the whole mushroom with every delightful bite.

What do oyster mushrooms do to you? ›

Oyster mushrooms are rich in antioxidant compounds such as flavonoids and phenolics. Antioxidants are substances that reduce or prevent cell damage in your body. Antioxidants fight free radicals, which are linked to diseases like cancer.

What is the difference between oyster mushrooms and king oyster mushrooms? ›

King Oysters are part of the same family as the regular oyster mushroom, but here the similarity ends. Both the flavor and texture are superior to its common cousin. The texture is possibly the meatiest in the gourmet mushroom world. There's fine chewing here.

How long do king oyster mushrooms last in the fridge? ›

When harvesting King Oysters, the mushroom is removed at the base of the stem and stored in clusters to increase shelf life. Fresh mushrooms keep for up to 10 days in the fridge while dried mushrooms keep for 6 months.

Are king oyster mushrooms healthy? ›

The mushroom has antiviral effects on the influenza and herpes viruses, among others, and is full of vitamins and minerals, including vitamin B6, riboflavin (also known as vitamin B2), magnesium, calcium, iron, selenium and niacin. In short: the king oyster mushroom is rightfully one of our delicious vitality boosters!

What should we not do before cooking mushrooms? ›

This is the big one: Do not salt the mushrooms too early in the cooking process. Salting too early often draws out too much of the inherent moisture or liquid, which can be a bit overwhelming if you're a mushroom newbie making a large batch.

What is the white stuff on my king oyster mushrooms? ›

What are the white powders around the caps of my king oyster mushroom? The white powders are spores of the mushrooms. They are safe to eat. Just like white fuzz or white hairs, you can also wipe these powder off with a wet cloth or paper towel.

Should you salt mushrooms before cooking? ›

Never salt the mushrooms before cooking. Salt draws out moisture and will therefore make them extremely mushy. We want a nice meaty delicious bite to them with color and texture, so salt at the end always.

Can you eat all parts of oyster mushrooms? ›

Versatile and delicious. In addition to offering potential health benefits, these mushrooms are prized for their culinary uses. All their parts are edible, including the caps, gills, and stems.

What is the fuzz on king oyster mushrooms? ›

Some mycelium (the mushroom organism) like chestnut or oyster tend to grow on the mushrooms they produce and not just on growing media. So the white fuzz you see on mushroom stems is almost certainly mushroom mycelium, rather than mold. This is completely harmless, and won't effect the taste of your mushroom dish.

Can I eat king oyster mushrooms raw? ›

All types of oyster mushrooms can be eaten raw, but they are generally better when cooked. Raw oyster mushrooms have a spongy texture and a slight metallic taste that is eliminated when cooked. King oyster mushrooms are technically edible raw, but their dense and chewy texture makes them less enjoyable.

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