What is Kimchi? A Complete Beginner's Guide to Korean Fermented Vegetables
Everything beginners need to know about kimchi - Korea's famous fermented vegetable dish. What it is, how it tastes, and why you should try it.
You've probably seen it on restaurant menus, spotted it in your local supermarket, or heard friends raving about its health benefits. But what exactly is kimchi?
Kimchi (pronounced kim-chee) is Korea's most famous culinary export - a fermented vegetable dish that's been a cornerstone of Korean cuisine for over 2,000 years. In this beginner's guide, we'll cover everything you need to know about this remarkable food.
What is Kimchi?
At its core, kimchi is fermented vegetables seasoned with a spicy paste. While there are hundreds of varieties, the most common type is made from:
- Napa cabbage (also called Chinese cabbage)
- Korean red pepper flakes (gochugaru)
- Garlic and ginger
- Fish sauce or salted shrimp (for umami)
- Salt
The vegetables are salted, coated in a flavourful paste, then left to ferment for days, weeks, or even months. This fermentation process gives kimchi its characteristic tangy flavour and creates beneficial bacteria called probiotics.
How to Pronounce Kimchi
Kimchi is pronounced kim-chee.
The "i" sounds like "ee" in "cheese." Some people mistakenly say "kim-chye" but this is incorrect.
In Korean, it's written as 김치 (gimchi), though in English it's universally spelled "kimchi."
What Does Kimchi Taste Like?
Kimchi has a unique, complex flavour that's hard to compare to Western foods. Here's what to expect:
- Sour: The fermentation creates lactic acid, giving kimchi a pleasant tanginess similar to sauerkraut or pickles
- Spicy: Most kimchi has a moderate to hot chilli kick from the gochugaru
- Umami: Fish sauce and fermentation create deep, savoury flavours
- Garlicky: Garlic is a key ingredient and comes through clearly
- Fresh/Crunchy: When young, the vegetables retain satisfying crunch
How the taste changes over time:
- Fresh (1-7 days): Crunchy, mildly tangy, vibrant
- Ripe (2-4 weeks): More sour, softer, deeper flavour
- Aged (1+ months): Very sour, soft, best for cooking
Most people find that kimchi is an acquired taste - the first bite might be surprising, but many become absolutely hooked!
Is Kimchi Spicy?
Classic kimchi is moderately spicy, but heat levels vary significantly:
- Most commercial kimchi: Mild to medium heat (accessible to most palates)
- Traditional Korean kimchi: Medium to hot (more authentic heat)
- White kimchi (baek kimchi): No heat at all (made without chilli)
If you're sensitive to spice, look for "mild" versions or try white kimchi. If you love heat, seek out traditional Korean brands or make your own with extra gochugaru.
What's in Kimchi? Key Ingredients
The Vegetables
Napa cabbage is the star of most kimchi. Also known as Chinese cabbage, it has long, pale green leaves and a mild flavour that absorbs seasonings beautifully.
Other vegetables used in different types of kimchi include:
- Korean radish (mu)
- Cucumbers
- Spring onions
- Mustard greens
The Seasonings
Gochugaru (Korean red pepper flakes) gives kimchi its signature colour and heat. It's different from other chilli flakes - slightly sweet and smoky with moderate heat.
Garlic and ginger provide aromatic depth. Korean recipes use significantly more garlic than most Western dishes.
Fish sauce or fermented shrimp paste adds umami (savoury depth). This is why traditional kimchi isn't vegan, though vegan versions exist.
The Science: Fermentation
The magic happens during fermentation. Natural bacteria on the vegetables (primarily Lactobacillus species) convert sugars into lactic acid. This:
- Preserves the vegetables naturally
- Creates the tangy flavour
- Produces beneficial probiotics
- Develops complex umami flavours
Is Kimchi Healthy?
Yes! Kimchi is considered a superfood with numerous science-backed health benefits:
- Probiotics: Unpasteurised kimchi contains billions of beneficial bacteria that support gut health
- Low calorie: Just 15 calories per 100g
- High in vitamins: Rich in vitamins A, C, K, and B vitamins
- Anti-inflammatory: Contains compounds that reduce inflammation
- Good for digestion: Fibre and probiotics support digestive health
The main consideration is sodium - kimchi is salty, so those monitoring salt intake should enjoy it in moderation.
Is Kimchi Vegan?
Traditional kimchi is not vegan because it contains fish sauce or fermented shrimp paste.
However, vegan kimchi is widely available and easy to make at home. Simply substitute the seafood with:
- Korean soup soy sauce (gukganjang)
- White miso paste
- Extra salt
When buying, check labels carefully - even "vegetarian" kimchi may contain fish sauce. Look specifically for "vegan" certification.
How is Kimchi Made?
Making kimchi is a multi-step process:
- Salting: Cabbage is salted for 6-12 hours to draw out moisture and wilt the leaves
- Rinsing: Excess salt is rinsed away
- Paste making: Gochugaru, garlic, ginger, and fish sauce are combined
- Mixing: The paste is worked into every cabbage leaf by hand
- Fermenting: Kimchi is packed into jars and left to ferment at room temperature for 1-5 days
- Storing: Once fermented to taste, it's refrigerated
Want to try? See our step-by-step kimchi recipe.
How Do You Eat Kimchi?
Koreans eat kimchi with virtually every meal. Here are the most popular ways to enjoy it:
As a Side Dish
The traditional way - simply serve a small bowl alongside any meal. It pairs brilliantly with rice, noodles, or protein.
In Cooked Dishes
- Kimchi fried rice - the classic way to use aged kimchi
- Kimchi stew (jjigae) - hearty and warming
- Kimchi pancakes - crispy and flavourful
- Soups and noodle dishes
Fusion Style
- Kimchi grilled cheese
- On burgers and hot dogs
- In tacos and quesadillas
- Mixed into eggs
Where Can I Buy Kimchi?
Kimchi is now widely available in the UK:
- Supermarkets: Tesco, Sainsbury's, Waitrose, M&S - usually in the Asian foods aisle
- Korean supermarkets: H Mart, Oseyo, SeeWoo - best selection and quality
- Online: Amazon, specialty food sites, artisan producers
- Our shop: Kimchi Quest - fresh, unpasteurised, UK-made
For detailed recommendations, see our complete UK kimchi buying guide.
How Long Does Kimchi Last?
One of the beautiful things about kimchi is its longevity:
- Unopened (refrigerated): Until the best-by date
- Opened: 3-6 months in the refrigerator
- At room temperature: 1-2 weeks (continues fermenting quickly)
Kimchi doesn't really "go bad" - it just becomes more sour over time. Very aged kimchi is perfect for cooking. Only discard if you see mould or it smells unpleasantly "off" rather than simply sour.
Brief History of Kimchi
Kimchi has a fascinating 2,000+ year history:
- Ancient times: Koreans preserved vegetables in salt for winter
- 12th century: Spices like garlic and ginger were added
- 16th century: Chilli peppers arrived in Korea via Portugal
- 18th century: Red pepper became standard, creating modern kimchi
- 2013: UNESCO recognised Kimjang (communal kimchi-making) as Intangible Cultural Heritage
Today, Koreans consume about 40 pounds (18kg) of kimchi per person annually - it's eaten at nearly every meal.
Types of Kimchi
There are over 200 varieties of kimchi! Here are the most common:
- Baechu kimchi: The classic napa cabbage version
- Kkakdugi: Cubed radish kimchi
- Oi sobagi: Stuffed cucumber kimchi
- Baek kimchi: White (non-spicy) kimchi
- Pa kimchi: Spring onion kimchi
- Mul kimchi: Water kimchi (in brine)
Learn more in our complete guide to kimchi varieties.
Ready to Try Kimchi?
If you've never tried kimchi, you're in for a treat. Here's how to start:
- Buy a small jar from your local supermarket or order from us
- Start simple - try it as a side dish with rice or in fried rice
- Give it time - most people become fans after a few tries
- Try different types - if red kimchi is too spicy, try white kimchi
Once you're hooked, try making your own - it's easier than you think and tastes amazing.
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