Gosari aka Fern Brake (or weird Korean brown vegetable) (2024)

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If you’re wondering what that long stranded brown vegetable in your bibimbap is, it’s a classic Korean side dish called gosari. The hardest part is not making it but finding it.

Gosari aka Fern Brake (or weird Korean brown vegetable) (1)

What do you call it?

For the longest time, this was just a “weird Korean brown vegetable.” One time I asked what it was in a restaurant, and they replied “mountain vegetable.”

If you knew this was called gosari in Korean, you really do deserve an honorary medal.

The pronunciation, btw, is not so much “GO-SORRY” but more like “goh-so-ree” with a soft g and a little roll to the r.

Other names you may see this dish called:

  • Gosari namul (the Korean name of this dish)
  • Fern bracken
  • Bracken fern
  • Fernbrake
  • Pteridium Aquilinum (the scientific name)
  • Fiddlehead ferns
  • Bracken fiddleheads
Gosari aka Fern Brake (or weird Korean brown vegetable) (2)

It is commonly found in bibimbap rice bowls or the hot beef noodle soup known as yukaejang.

Fern origins

According to Lee Wade’s Korean Cookery cookbook, gosari is “edible racken, young shoots, gathered in April and May and sold fresh at that time, when they are delicious. Large quantities are also dried…those that have been dried are not so good to eat as the fresh ones.”

Gosari aka Fern Brake (or weird Korean brown vegetable) (3)

Now how you get this dark brown vegetable from a bright green fern always confused me, but it starts green and turns brown when it dries.

Where do you buy it?

Fresh bracken can be foraged in the wild. However, it can be found in the dried vegetable aisle of the Korean supermarket or on Amazon:

Dried without flowers here – assi brand

Dried with flowers here – ROM America brand

In addition, it can be found in the refrigerator section of the Korean market, usually near the pickled vegetables, already rehydrated and ready to go.

Gosari aka Fern Brake (or weird Korean brown vegetable) (4)

How many calories are in gosari?

Per the USDA, 100g of raw fiddlehead ferns is 34 calories.

With additional seasonings, one serving in this recipe below is 51 calories.

Does it cause cancer?

Fiddlehead ferns have ptalquiloside, a known carcinogen. However, studies have shown that boiling and salting the vegetable can denature and greatly reduce this toxin.

As we know, many things cause cancer, including the char on grilled meat, red food color, and stress.

To each their own, and everything in moderation as Julia Child would say.

How to cook it

Time needed:1 hour

Rehydrating the gosari takes the longest time. After that, it’s a quick stir fry.

  1. Cook fern brake

    Put dried fern brake into a pot and cover with water. Bring to a boil and simmer for 30-45 minutes, covered. Gosari aka Fern Brake (or weird Korean brown vegetable) (5)

  2. Turn off the heat and let fern brake sit.

    This will allow it to soften further. Gosari aka Fern Brake (or weird Korean brown vegetable) (6)

  3. Drain and chop

    Chop into thirds to make manageable sized pieces for eating. Gosari aka Fern Brake (or weird Korean brown vegetable) (7)

  4. Saute

    Heat a pan with oil and stir fry with minced garlic over medium heat. Gosari aka Fern Brake (or weird Korean brown vegetable) (8)

  5. Season

    Finish with soy sauce. Taste for seasoning and adjust with salt if needed.Gosari aka Fern Brake (or weird Korean brown vegetable) (9)

  6. Serve hot, room temperature or cold.

    Keep for up to a week in the fridge. Gosari aka Fern Brake (or weird Korean brown vegetable) (10)

Helpful Tips

  1. You can buy dried fernbrake in the vegetable aisle or presoaked fernbrake in the refrigerator section of Korean markets.
  2. Fernbrake can come with or without flower buds at the top. Either variety will work depending on your preference or what you can find.
  3. If you care not to cook your fern brake for 45 minutes, you can soak overnight to reduce cooking time. The texture should be soft but not mushy.
  4. If you prefer not to cook with sesame oil due to its low smoke point, you can use another oil and finish with a little bit of sesame oil after cooking for flavor.
  5. This will last up to a week in the fridge.
  6. Serve as a side dish or add to Korean dishes such as bimbap or yuk gae jang.

Gosari aka Fern Brake (or weird Korean brown vegetable) (11)

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Korean Fernbracken

This classic Korean side dish has an earthy, forest floor flavor with a texture that is slippery and fun to chew. It just needs to be hydrated well and stir fried with simple ingredients.

Course Side Dish

Cuisine Korean

Diet Low Fat, Low Lactose, Vegan, Vegetarian

Keyword weird brown Korean vegetable

Prep Time 45 minutes minutes

Cook Time 10 minutes minutes

Servings 6

Calories 51kcal

Ingredients

  • 2 oz dried fern brake about a small handful of dried strands
  • 2 Tb sesame oil, or other oil see Note 4
  • 2 cloves garlic minced
  • 3 Tb soy sauce

Optional Garnish

  • toasted sesame seeds

Instructions

  • Put fern brake in a large pot and cover with water. Bring to a boil, and simmer, covered, for 30-40 minutes until the strands are hydrated and thick.

  • Turn off the heat and let sit for another 15-20 minutes. This helps them soak up more water and get softer. Drain and set aside.

  • Heat a pot to medium heat. Add the garlic and gently stir fry for 30 seconds until fragrant.

  • Add the hydrated and drained fern brake. Add soy sauce and stir fry for a few minutes until heated through. Taste and check for seasoning. Add salt if needed.

  • Serve warm, room temperature, or cold.

Notes

  1. You can buy dried fernbrake in the vegetable aisle or presoaked fernbrake in the refrigerator section of Korean markets.
  2. Fernbrake can come with or without flower buds at the top. Either variety will work depending on your preference or what you can find.
  3. If you care not to cook your fern brake for 45 minutes, you can soak overnight to reduce cooking time. The texture should be soft but not mushy.
  4. If you prefer not to cook with sesame oil due to its low smoke point, you can use another oil and finish with a little bit of sesame oil after cooking for flavor.
  5. This will last up to a week in the fridge.
  6. Serve as a side dish or add to Korean dishes such as bimbap or yuk gae jang.

Nutrition

Calories: 51kcal | Carbohydrates: 1g | Protein: 1g | Fat: 5g | Saturated Fat: 1g | Sodium: 503mg | Potassium: 54mg | Fiber: 1g | Sugar: 1g | Vitamin A: 342IU | Vitamin C: 3mg | Calcium: 7mg | Iron: 1mg

Tried this recipe?Mention @agiletestkitchen or tag #agiletestkitchen!

Reader Interactions

Comments

  1. Chuck Masterson

    Those aren’t flower buds – they’re leaves, curled up into tight little rolls. (Well, strictly, fern leaves aren’t called leaves, they’re called fronds, and the separate sections of them are called pinnae.) Ferns don’t actually make flowers at all. They reproduce by way of spores. They’re a very strange, ancient group of plants.

    Reply

    • [emailprotected]

      Hi Chuck! I didn’t know they were leaves that looked like flower buds. Thank you so much for providing this helpful information and visiting this site! I do agree it’s a strange plant. 🙂

      Reply

  2. Liz

    I have always known this dish to be called “mountain vegetable” and never quite understood what it was. I’m glad to understand its origins and how to make it! Thank you for such an informative article!

    Reply

    • Deanna @ Agile Test Kitchen

      Thank you so much Liz for the kind comment and for taking the time to visit and read this post. Yes, I have oft heard this called a mystery “mountain vegetable” too at restaurants where they don’t quite explain it in detail. The world could use more people like you! 🙂

      Reply

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Gosari aka Fern Brake (or weird Korean brown vegetable) (2024)

FAQs

What is gosari good for? ›

In Korean culture, gosari is a significant part of many diets as an essential ingredient in bibimbap, one of the most famous Korean dishes, as well as used to make soups and side dishes like gosari namul.

What does fernbrake taste like? ›

Gosari is the immature frond (known as fiddlehead) of a bracken (aka fernbrake) which grows in the hills and mountains. It has a deep, earthy flavor with a chewy texture, which makes it an essential addition to dishes such as bibimbap and yukgaejang. What is this? You can buy dried gosari (고사리) at any Korean market.

What is gosari in English? ›

In Korea, bracken (sometimes referred to as 'fernbrake' in Korean recipes) is known as gosari (고사리), and is a typical ingredient in bibimbap, a popular mixed rice dish.

What to do with gosari? ›

Gosari is one of the most ubiquitous banchans in Korea and eaten throughout the year. It's probably not the first time you have seen it. Its one of the main toppings in traditional Bibimbap. Or you may have tried it in Yukgaejang (Spicy Beef Soup).

What does fern do to your body? ›

Male fern is used to treat nosebleeds, heavy menstrual bleeding, wounds, and tumors. It is also used to expel worms, typically tapeworms, from the intestines. Some veterinarians use male fern to treat worms in animals.

Is fernbrake toxic? ›

All parts of the plant are toxic in both green and dry forms.

Is it safe to eat bracken ferns? ›

It is not recommended to eat rare bracken under any circ*mstances because of the statistical increase in cancers in countries where brackens are a consumed in high numbers. Ostrich Ferns are of such low toxicity as to be far preferable to meet the dietary interest in fiddleheads.

How do you soak fernbrake? ›

Rinse the fernbrake a couple of times, drain and put it in a bowl. Cover with fresh cold water and let soak for at least 8 hours or overnight in a cool place, changing the water 2 or 3 times during the soaking. Taste the gosari: It should be soft.

Is bracken fern cancerous? ›

Bracken fern (Pteridium spp.), one of the most abundant plants on the planet, is well known to cause cancer naturally in sheep and cattle. It contains, in some locations, extremely high concentrations of ptaquiloside which almost certainly is its major carcinogen.

How long does gosari last? ›

Then, boil over medium heat for 20-30 minutes until desired texture is reached. Rinse in cold water and then squeeze out the remaining water. Lastly, comb through the gosari for any tough or woody portions and cut off. These dried bracken slices last up to a year in a cool, dry, airtight container.

What is the nutritional value of fernbrake? ›

Fernbrake - 1 oz
  • Total Fat 1.1g 1%
  • Saturated Fat 0.4g 2%
  • Polyunsaturated Fat 0.3g.
  • Monounsaturated Fat 0.2g.
  • Cholesterol 0mg 0%
  • Sodium 20mg 1%
  • Total Carbohydrates 16g 6%
  • Dietary Fiber 8.7g 31%
Apr 27, 2022

What is a substitute for fernbrake? ›

You can use shiitake mushroom in place for fernbrake, and increase the amount of leek and mung bean sprouts for the taro stem. I have introduced a simpler version of yukgaejang recipe in my “Korean Cooking Favorites” cookbook that doesn't require these dried vegetables, so check it out.

What are the benefits of fiddleheads? ›

Fiddlehead ferns are high in antioxidants and essential fatty acids, which are often found in so-called "superfoods." They can be especially good for people who don't eat fish, which are also high in essential fatty acids. Potassium. One serving of fiddlehead ferns provides about 11% of the daily potassium you need.

What are the healing benefits of ferns? ›

Rattlesnake Fern (Botrychium virginianum) used as a cough medicine for tuberculosis. Hay-scented Fern (Dennstaedtia penctilobula) used for chills and lung hemorrhages. Rock Cap (Polyopdium virginianum) used for sore throat, colds, measles, tuberculosis, cough, and lung congestion.

What are the health benefits of bracken? ›

Bracken was used extensively by native Americans as a medicinal plant, to treat a wide variety of ailments including nausea, stomach cramps, rheumatism, and headaches.

What can bracken be used for? ›

Uses of bracken

The young fronds are cooked as vegetables or in soups in Japan and other parts of Asia. They were once sold in bundles in a similar way to asparagus. The rhizomes have even been used to make bread flour.

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