What Is Gochujang? Korean Fermented Chili Paste Explained

Gochujang (고추장, pronounced go-choo-jang) is the fermented chili paste that sits alongside doenjang and ganjang as one of the three foundational fermented condiments in Korean cooking. I kept a tub of it in my refrigerator for six months before I understood what it actually does. I used it as a straight chili paste — a spoonful here, a spoonful there — and wondered why Korean dishes I made with it tasted one-dimensional. The problem was not the gochujang. It was that I was using it wrong.

Gochujang is not a hot sauce. It is a fermented paste with four simultaneous flavour dimensions — heat, sweetness, earthiness, and umami — that requires cooking to fully activate. Used raw it tastes sharp and unbalanced. Cooked into a dish or bloomed in oil it transforms into something completely different.

What is gochujang made from and how is it fermented?

Gochujang is made from gochugaru (Korean red pepper flakes), glutinous rice, meju-garu (fermented soybean powder), yeotgireum (barley malt powder), and salt. The mixture is combined into a thick paste and fermented in earthenware pots called onggi for a minimum of 3 months and traditionally up to 3 years. The glutinous rice provides the sweetness — its starches convert to sugars during fermentation. The fermented soybean powder provides the umami depth. The gochugaru provides the heat and colour.

According to Wikipedia’s entry on gochujang, the earliest documented recipe dates to 1740 and gochujang has been a staple of Korean cooking for over 600 years. The fermentation produces a paste dense with glutamates, capsaicin, and complex sugars that no amount of mixing raw ingredients can replicate.

What does gochujang taste like?

Gochujang tastes simultaneously spicy, sweet, earthy, and deeply savoury — four flavours present at the same time rather than in sequence. The heat is warm and building rather than sharp and immediate — similar to gochugaru but with added fermented complexity behind it. The sweetness is genuine, coming from the glutinous rice fermentation rather than added sugar. The earthiness comes from the fermented soybeans.

The first time I tasted gochujang straight from the tub I found it overwhelming — too much of everything at once. The second time I stirred a tablespoon into kimchi-jjigae during the blooming step and understood it completely. Cooked into fat alongside gochugaru, the four flavour dimensions balanced and integrated in a way that raw tasting could not reveal.

How does gochujang differ from gochugaru?

Gochugaru is dried and ground Korean red chili — a single-ingredient spice providing heat, fruitiness, and colour. Gochujang is a fermented paste made from gochugaru plus three additional fermented ingredients — glutinous rice, soybean powder, and barley malt. Gochujang has sweetness and umami depth that gochugaru lacks entirely.

In practical terms: gochugaru provides heat and colour. Gochujang provides heat, colour, sweetness, and fermented depth simultaneously. Most Korean stews use both — gochugaru for the primary heat and colour layer during blooming, gochujang for the fermented complexity added immediately after.

How do you use gochujang in Korean cooking?

Gochujang serves four primary functions — as a component of the blooming base in jjigae, as the primary ingredient in tteokbokki sauce, as a base for marinades, and as a component of ssamjang dipping sauce.

In jjigae: Add 1 teaspoon of gochujang alongside 1 tablespoon of gochugaru during the blooming step — fry both in sesame oil for 60 to 90 seconds before adding any liquid. The gochujang adds fermented sweetness and depth to the chili oil base. My kimchi-jjigae recipe uses this combination.

In tteokbokki sauce: Combine 3 tablespoons gochujang with 1 tablespoon soy sauce, 1 tablespoon sugar, and 1 cup water or anchovy stock. Simmer with rice cakes for 8 to 10 minutes until the sauce reduces and coats. The gochujang is the sauce — not a seasoning component but the entire base.

As a marinade: Combine 2 tablespoons gochujang with 1 tablespoon sesame oil, 1 tablespoon soy sauce, 1 tablespoon sugar, and minced garlic. Use for bulgogi, pork belly, and chicken. Marinate for a minimum of 2 hours and ideally overnight. The fermented enzymes tenderise the protein during marination.

In ssamjang: Combine 2 tablespoons doenjang with 1 tablespoon gochujang, 1 teaspoon sesame oil, 1 teaspoon sugar, and minced garlic for the dipping sauce served with Korean BBQ.

Can you substitute gochujang?

There is no direct substitute that replicates all four of gochujang’s simultaneous flavour dimensions. In an emergency — combine 1 tablespoon of red miso with 1 teaspoon of sriracha and ½ teaspoon of sugar. This approximates the fermented depth and heat but lacks the specific glutinous rice sweetness and gochugaru fruitiness. The result is functional for cooked dishes but noticeably different from authentic gochujang.

Gochujang is available at H Mart, Korean grocery stores, Asian supermarkets, and online. CJ Haechandle and Sempio are reliable everyday brands. Buy the medium heat version first — the heat level on commercial gochujang varies significantly between brands and the medium version is most versatile.

How do you store gochujang?

An opened tub of gochujang keeps in the refrigerator for up to 12 months. Press cling film directly onto the surface before sealing to prevent oxidation and surface darkening. Surface darkening is normal — stir it back in before using. The sign that gochujang has gone off: mould growth on the surface or a sour, acrid smell rather than the characteristic fermented chili aroma.

FAQ

What is the difference between gochujang and gochugaru? Gochugaru is dried Korean red chili flakes — a single ingredient providing heat, fruitiness, and colour. Gochujang is a fermented paste made from gochugaru plus glutinous rice, fermented soybean powder, and barley malt — adding sweetness and umami depth that gochugaru lacks. Most Korean recipes use both simultaneously.

Is gochujang very spicy? Gochujang is moderately spicy — the heat is warm and building rather than sharp and immediate. The sweetness from glutinous rice fermentation tempers the chili heat significantly. Commercial gochujang ranges from mild to hot — start with medium heat and adjust. The spice level also reduces during cooking.

Can I substitute sriracha for gochujang? No directly — sriracha is a vinegar-based hot sauce without fermented sweetness or umami depth. It provides heat but none of the complexity. In an emergency combine red miso, sriracha, and sugar to approximate gochujang’s flavour profile. Always source actual gochujang if possible — it is widely available online.

How long does gochujang last in the refrigerator? Gochujang keeps for up to 12 months refrigerated in a sealed container with cling film pressed onto the surface. The salt and fermentation provide natural preservation. Replace when mould appears or the smell turns acrid rather than fermented.