Korean pepper powder, known as gochugaru, is a vibrant red chili powder made from dried Korean peppers (Capsicum annuum). It’s the backbone of Korean cooking, responsible for the distinctive color and flavor of kimchi, stews, and countless other dishes. Unlike generic red pepper flakes you’d find at a pizza shop, gochugaru has a complex flavor that balances mild heat with sweetness, fruitiness, and a subtle smokiness.
How Gochugaru Is Made
Gochugaru starts with Korean red chili peppers harvested in autumn. Traditionally, these peppers are split open, seeded (partially or fully), and dried under the sun over several days. This sun-drying process allows for natural oxidation and slow flavor development, producing the rich, slightly smoky taste that defines the spice. The dried peppers are then ground or crushed to the desired texture.
Sun-dried gochugaru, sometimes labeled “taeyangcho” on packaging, is considered the premium version. Industrial drying methods using high-temperature ovens speed up production but can introduce bitterness and a burnt aftertaste. You can often tell the difference visually: traditionally dried gochugaru has a deep, natural red color, while industrially processed versions may look artificially bright or washed out.
Flavor and Heat Level
Gochugaru’s appeal lies in its layered flavor. It’s not just “hot.” The initial taste is fruity and slightly sweet, followed by a warm, building heat and a faint smokiness. This complexity is why Korean recipes call for it in generous quantities that would be unthinkable with a hotter, one-dimensional chili powder.
On the Scoville scale, gochugaru typically ranges from 1,500 to 10,000 SHU, placing it in the mild to moderate category. For reference, jalapeños sit between 2,500 and 8,000 SHU, so gochugaru covers a similar range. Korean markets usually sell two heat grades. The milder version, called “deol maewoon” (덜매운), falls around 1,500 to 4,000 SHU. The spicier version, “maewoon” (매운), ranges from 6,000 to 10,000 SHU. Both retain the same fruity, sweet base flavor; the difference is purely in heat intensity.
Coarse Flakes vs. Fine Powder
Gochugaru comes in two main textures, and they’re not interchangeable in Korean cooking. Coarse flakes have a slightly rough, papery texture and are the standard choice for making kimchi and for sprinkling into soups, stews, and side dishes. The flakes cling to vegetables during fermentation and add texture alongside flavor. Fine gochugaru is ground to a powder consistency and works best in smooth sauces, marinades, and pastes. It’s the form used to make gochujang, the fermented chili paste. If a Korean recipe doesn’t specify, it’s usually calling for the coarse flakes.
Nutritional Profile
Like most chili powders, gochugaru is rich in vitamins A and C, both of which play roles in immune function and tissue repair. It also contains capsaicin, the compound responsible for the burning sensation. Capsaicin has been linked to modest metabolic benefits and anti-inflammatory effects, though the amounts in a typical serving of gochugaru are small. The carotenoids that give it that deep red color also function as antioxidants. Korean red pepper varieties contain between 187 and 335 milligrams of carotenoids per 100 grams of powder, which is a meaningful concentration, though again, you’re using tablespoons rather than cups.
How to Store It
Gochugaru loses its color, flavor, and aroma over time when exposed to air, light, and heat. Once opened, your best bet is to transfer it to an airtight container and store it in the freezer. The cold slows oxidation and preserves the vibrant red color. Vacuum-sealed gochugaru can last 18 months or longer in the freezer with minimal quality loss. At room temperature in your pantry, an opened bag will start to dull and lose its fruity sweetness within a few months. If your gochugaru has turned brownish and smells flat, it’s past its prime.
What to Use as a Substitute
No single substitute perfectly replicates gochugaru’s balance of sweetness, mild heat, and smokiness, but a few options come close depending on the recipe. Aleppo pepper flakes are the nearest match in both texture and flavor profile, offering fruity, moderate heat with a similar oily quality. Smoked paprika captures the color and smokiness but lacks the heat, so you may want to add a pinch of cayenne alongside it.
Standard crushed red pepper flakes provide comparable heat but miss the sweet and smoky notes entirely. Cayenne pepper is significantly hotter, so use about half the amount a recipe calls for. If you’re making a sauce or stew, a small amount of gochujang (fermented chili paste) can approximate the flavor, though it adds sweetness, saltiness, and moisture that will change the dish’s balance. For kimchi specifically, there really is no good substitute. The coarse flakes are essential to both the texture and the fermentation flavor.
Common Uses in Korean Cooking
Gochugaru shows up in nearly every corner of Korean cuisine. Its most famous role is in kimchi, where coarse flakes are mixed into a paste with garlic, ginger, fish sauce, and salted shrimp, then packed around napa cabbage to ferment. The spice is also central to tteokbokki (spicy rice cakes), sundubu-jjigae (soft tofu stew), and the marinade for bulgogi and dakgalbi (spicy chicken stir-fry).
Beyond traditional recipes, gochugaru works well anywhere you want warmth without overwhelming heat. It’s excellent sprinkled over roasted vegetables, stirred into mayo for a spicy sandwich spread, or mixed into a vinaigrette. Because it dissolves more readily than standard red pepper flakes, it blends smoothly into liquids and coats food evenly. Its mild, forgiving heat makes it hard to overdo, which is part of why Korean cooking uses it so liberally.