King Trumpet Oyster

Summary

The King Trumpet Oyster Mushroom, sometimes called French Horn, Trumpet Royale, and King Brown Mushroom, is also known by its Latin name, Pleurotus eryngii. This native Mediterranean mushroom is a highly sought-after tasty edible culinary delight, rich in Unami flavour. It is the largest of the oyster mushroom (Pleurotus) family, and the King Trumpet is also unique in that it is an NTF—a nematode-trapping fungus growing as a parasite on the roots of herbaceous plants. Like most other Oyster mushrooms, it is also a saprotrophic fungus growing on decaying wood and organic matter.

King Trumpet Mushroom Description and Taste

The King Trumpet mushroom is instantly recognisable. Its thick, elongated, and tasty stem, often compared to that of a trumpet or a small club, makes it stand out from other mushrooms. The stem can grow long, typically from 4 to 8 inches (10 to 20 centimeters). It is usually pure white in color and has a firm, meaty texture.

At the top of the King Trumpet stem, there is a small, rounded cap, usually dark brown in colour and may have a slightly convex shape. Unlike some other mushroom varieties, the cap of the King Trumpet is not very prominent and often blends in with the stem. When fully grown, the King Trumpet mushroom resembles a thick, white cylinder with a small brownish-coloured cap at the top.

 

What are the Uses of King Trumpet mushrooms?

The versatility of the King Trumpet mushrooms makes them a highly sought-after favourite ingredient amongst chefs. As well as being incredibly popular in the kitchen, there are plenty of potential medicinal and health benefits associated with the King Trumpet mushroom:

Immune Support: King Trumpet Oyster mushrooms contain beta-glucans, compounds that may help modulate the immune system and enhance its function. Consuming foods rich in beta-glucans, such as King Trumpet mushrooms, may help support overall immune health and improve the body’s ability to defend against infections and diseases.

Anti-Inflammatory Properties: Some studies suggest that certain compounds found in King Trumpet mushrooms, such as ergothioneine and erinacines, possess anti-inflammatory properties. These compounds may help reduce inflammation in the body, which is associated with various chronic diseases and conditions.

Antioxidant Activity: King Trumpet mushrooms are rich in antioxidants, including phenolic compounds and polysaccharides, which help neutralize harmful free radicals in the body. By scavenging free radicals, antioxidants help protect cells from oxidative stress and damage, potentially reducing the risk of chronic diseases such as cancer, heart disease, and neurodegenerative disorders.

Cardiovascular Health: Some research suggests that consuming King Trumpet Oyster mushrooms may have beneficial effects on cardiovascular health. Compounds found in these mushrooms, such as beta-glucans and sterols, may help lower cholesterol levels, improve blood lipid profiles, and promote overall heart health.

Digestive Health: King Trumpet mushrooms are a good source of dietary fiber, which plays a crucial role in digestive health. Fiber helps regulate bowel movements, promotes the growth of beneficial gut bacteria, and may reduce the risk of digestive disorders such as constipation, diverticulosis, and colon cancer.

Neuroprotective Effects: Certain compounds found in King Trumpet mushrooms, such as erinacines and hericenones, have been studied for their potential neuroprotective effects. These compounds may help stimulate nerve growth and repair, protect against neurodegenerative diseases such as Alzheimer’s and Parkinson’s, and improve cognitive function.

King Trumpet in the kitchen

The versatile King Trumpet mushroom is beloved by chefs due to its rich Unami flavour and robust meaty texture. Here are just some of the more popular culinary uses for  the King Trumpet mushroom:

Sautéing and Stir-Frying: King Trumpet mushrooms are excellent when sautéed or stir-fried. Their firm texture holds up well to high heat, allowing them to develop a golden-brown exterior while remaining tender on the inside. Sautéed King Trumpet mushrooms can be enjoyed as a standalone side dish or incorporated into pasta, rice dishes, or vegetable medleys.

Grilling and Roasting: Because of their meaty texture, King Trumpet mushrooms are ideal for grilling or roasting. When cooked over an open flame or in the oven, they develop a rich, smoky flavour and a satisfying charred exterior. Grilled or roasted King Trumpet mushrooms can be served as a hearty appetiser, added to sandwiches or burgers, or used as a meat substitute in vegetarian dishes.

Braising and Braised Dishes: King Trumpet Oyster mushrooms can also be braised to tender perfection in flavourful liquids such as broth, wine, or sauce. Braised King Trumpet mushrooms absorb the surrounding flavours while maintaining their firm texture, making them a delicious addition to stews, soups, and braised meat dishes.

Raw Preparations: While King Trumpet mushrooms are typically cooked, they can also be enjoyed raw when thinly sliced or shaved. Their mild, slightly sweet flavour and firm texture make them a tasty addition to salads, crudité platters, or as a garnish for appetisers and hors d’oeuvres.

Meat Substitution: Because of their meaty texture and rich flavour, King Trumpet Oyster mushrooms are often used as a vegetarian or vegan alternative to meat in numerous dishes. Sliced or diced King Trumpet mushrooms can be used to create vegetarian versions of classic dishes such as mushroom “steaks,” burgers, tacos, and stir-fries

Stocks and Broths: King Trumpet mushrooms can also be used to enhance the flavor of stocks and broths. Their umami-rich taste adds depth and complexity to soups, sauces, and gravies, making them an excellent ingredient for creating richly flavoured vegetarian or vegan broths.

Nutritional Value of king trumpet Oyster mushroon

King Trumpet Oyster mushrooms are packed full of nutrients and offer a range of vitamins, minerals, and other beneficial compounds. They can be a valuable addition to a balanced diet, providing essential nutrients while adding delicious, rich Unami flavour and a firm, meaty texture to meals.

Here’s an overview of the nutritional value of King Trumpet Oyster mushrooms per 100 grams (raw):

• Calories: Approximately 27 calories
• Protein: About 3 grams
• Fat: Less than 1 gram
• Carbohydrates: Around 3 grams
• Dietary Fiber: Roughly 1 gram
• Vitamins:
  • Vitamin D: King Trumpet mushrooms can provide a significant amount of vitamin D when exposed to sunlight during growth or through fortification.
  • B Vitamins: Contains various B vitamins, including riboflavin (B2), niacin (B3), pantothenic acid (B5), pyridoxine (B6), and folate (B9).
  • Vitamin C: Contains a small amount of vitamin C.
• Minerals:
  • Potassium: Approximately 400 mg, making King Trumpet mushrooms a good source of potassium.
  • Phosphorus: Contains a moderate amount of phosphorus.
  • Copper: Provides a notable amount of copper.
  • Selenium: Contains a small amount of selenium.
  • Iron: Provides a small amount of iron.
  • Zinc: Contains a small amount of zinc.
• Other Nutrients:
  • Antioxidants: King Trumpet mushrooms contain various antioxidants, including phenolic compounds and polysaccharides, which help protect cells from oxidative damage.
  • Beta-glucans: These compounds may help support the immune system and promote overall health.
  • Ergothioneine: A unique antioxidant found in mushrooms, including King Trumpet mushrooms, which may have protective effects against oxidative stress and inflammation.

How to Store the King Trumpet Mushroom?

Proper storage is essential to maintain the freshness and quality of King Trumpet mushrooms. Here’s how to store them:

1. Refrigeration: The best way to store King Trumpet mushrooms is in the refrigerator. Place them in a paper bag or a loosely closed plastic bag to allow for air circulation. Alternatively, you can wrap them in a paper towel and then place them in a perforated plastic bag. Avoid storing them in airtight containers or plastic bags without any ventilation, as this can cause them to become slimy and spoil more quickly.
2. Temperature: Store King Trumpet mushrooms in the refrigerator’s main compartment, preferably in the crisper drawer. The optimal temperature for storing mushrooms is between 32°F to 38°F (0°C to 3°C). Avoid placing them in the coldest part of the refrigerator, such as near the back or in the freezer compartment, as extreme cold can damage the mushrooms.
3. Moisture: Mushrooms are prone to moisture buildup, which can lead to spoilage. To prevent excess moisture accumulation, avoid washing King Trumpet mushrooms before storing them. Instead, wait until you’re ready to use them, and then gently wipe them clean with a damp paper towel or brush off any dirt. Excess moisture can cause the mushrooms to become slimy and degrade more quickly.
4. Ventilation: King Trumpet mushrooms require proper ventilation to maintain their freshness. If storing them in a plastic bag, make sure it has some perforations or leave the bag slightly open to allow for air circulation. This helps prevent the buildup of moisture and allows the mushrooms to breathe, extending their shelf life.
5. Use promptly: While King Trumpet mushrooms can be stored in the refrigerator for several days, they should be used as soon as possible for the freshest taste and texture. Avoid storing them for extended periods, as they will gradually lose their flavour and may begin to deteriorate.

By following these storage tips, you can keep your King Trumpet mushrooms fresh and flavourful for longer, ensuring that they’re ready to use whenever you’re craving their delicious taste and meaty texture.

Out in the Wild

Foraging for King Trumpet Oyster mushrooms in the wild can be an exciting and rewarding experience, but it requires caution and knowledge of their habitat and characteristics. The King Trumpet mushroom is believed to have originated in the Mediterranean region, including countries such as Italy, Spain, Greece, and Turkey. It is commonly found growing on decaying organic matter in forests, woodlands, and other wooded habitats and woody debris across the Mediterranean, parts of the Middle East and Asia. Here’s some information about locating King Trumpet mushrooms in their natural environment:

1. Habitat: King Trumpet mushrooms are saprobic, meaning they typically grow on decaying organic matter such as dead or decaying trees, stumps, logs, and woody debris. They prefer hardwoods like oak, beech, and chestnut, and are commonly found in forests, woodlands, and other wooded areas. Look for them in shaded and moist environments, especially after periods of rain or high humidity.
2. Appearance: Identifying King Trumpet mushrooms in the wild requires familiarity with their distinctive features. They have thick, elongated stems and small, rounded caps, often with a dark brown coloration. The stems are typically pure white and can grow quite long, resembling a trumpet or club shape. However, be cautious and confirm their identity through multiple characteristics to avoid misidentification.
3. Season: King Trumpet mushrooms can fruit at various times of the year, depending on environmental conditions and geographic location. In temperate regions, they are most commonly found in late summer to autumn, but they can also appear in spring and early summer under the right conditions.

 

King Trumpet FAQs

Q. Can you eat the whole King Trumpet Mushroom?

A: Yes, you can eat the King Trumpet mushroom in its entirety, cooked and uncooked.

Q. Are King Oyster and King Trumpet the same?

A. No. Although closely related and of similar appearance, King Oyster mushrooms have shorter, thicker stems that are more cylindrical in shape, whilst King Trumpet mushrooms have longer, narrower stems that are often likened to a trumpet or club shape. The cap size on the King oyster is larger than that of the King Trumpet.

Q. How long does the King Trumpet Mushroom take to fruit?

A. Once you open your King Trumpet box and follow the instructions, you should be looking at around 2-3 weeks to fruit. Once you have harvested your first ‘flush’, you can expect a second flush around 30-50% of the first flush, around 3 weeks later. It is not unusual to get a few hundred grams on a third flush 3 weeks later.