Gochugaru is a Korean chili made from deseeded red peppers, with a vivid crimson color, moderate heat, and a fruity, lightly smoky sweetness. Red pepper flakes are crushed mixed chiles with seeds, delivering a balanced, steady warmth and a toasty, slightly fruity flavor. The difference is in the pepper variety, the processing method, and the heat profile. Gochugaru gives deep color and gentle, building warmth. Red pepper flakes give everyday, all-purpose heat.
| Gochugaru | Red Pepper Flakes | |
|---|---|---|
| Flavor/Aroma | Fruity, lightly smoky, sweet undertones | Toasty, warm, slightly fruity, clean pepper heat |
| Form | Coarse flakes or fine powder, deseeded | Crushed flakes with seeds |
| Best uses | Kimchi, Korean stews and soups, marinades, gochujang | Pizza, pasta, marinara, chili oil, finishing |
| Heat | Mild to moderate, slow-building, 1,500-10,000 SHU | Mild to medium, steady warmth, 15,000-30,000 SHU |
| Origin | Korean peppers, sun-dried, deseeded before grinding | Mixed chiles, often jalapeño, serrano, cayenne blends |
| Interchangeable? | No; gochugaru is sweeter, milder, more complex | No; flakes are hotter, simpler, and lack the sweetness |
What Gochugaru Is
Gochugaru Korean Chili
When a dish needs deep red color and a warmth that builds...
Gochugaru is the chili at the heart of Korean cooking. It is made from elongated, slender Korean red peppers that are harvested fully ripe, deseeded, and sun-dried slowly over a week or more. The slow drying allows enzymes to break down starches into sugars, concentrating a fruity, lightly smoky sweetness while preserving the bright red pigment. Korean cooks remove the seeds and the inner white membrane before grinding, which is why gochugaru gives such vivid crimson color without overwhelming heat. The texture sits between a coarse flake and a fine powder, so it blends into a paste yet still reads as chili in the bowl.
The heat range is mild to moderate, typically 1,500 to 10,000 SHU, with a slow, building warmth rather than a sharp sting. It is sold in two grades: deol maewoon (less spicy, used for color and mild warmth) and maewoon (spicy, with a stronger kick but still balanced by sweetness). You fold it into kimchi, stir it into stews and soups, work it into marinades for grilled meat, or mix the fine powder into gochujang (fermented chili paste).
What Red Pepper Flakes Are
Crushed Red Pepper Flakes
The jar you reach for over a pizza, a bowl of pasta,...
Red pepper flakes are the everyday warm heat that lifts a dish without taking it over. They are made from crushed dried chiles, most often a blend of jalapeño, serrano, cayenne, and sometimes milder varieties like ancho or even bell pepper. The peppers are dried and crushed with the seeds left in, which is why the flakes contain both pepper flesh and visible seed flecks. The heat comes not from the seeds themselves but from the pale inner membrane (the placental tissue) that the seeds cling to. The seeds carry a little heat from that contact, but they are not the source. The heat range is mild to medium, typically 15,000 to 30,000 SHU, and it registers as a steady, rounded warmth that spreads evenly through a dish.
The flavor is toasty, warm, and slightly fruity, with clean pepper heat and no added salt, sugar, or fillers in a pure product. You scatter it over pizza and pasta, stir it into marinara and arrabbiata, bloom it in oil for chili oil, or shake it onto eggs, popcorn, roasted vegetables, and grilled meats. It is the jar on the pizzeria table and the everyday finishing heat in Italian and Italian-American cooking.
What’s the Difference Between Gochugaru and Red Pepper Flakes?
The difference is in the pepper variety, the processing method, and the heat profile. Gochugaru is made from a specific Korean pepper cultivar, deseeded before grinding, and sun-dried slowly to concentrate sugars and develop a fruity, smoky sweetness. The result is a vivid red chili with moderate heat, deep flavor complexity, and a texture that blends into pastes yet still reads as flakes. It is the foundation of Korean cooking, built for kimchi, stews, and fermented pastes.
Red pepper flakes are a blended product made from multiple chile varieties, crushed with the seeds left in. The heat is hotter and more direct, with a simpler, toasty pepper flavor and no sweetness. The flakes are coarser and the seeds give a slightly bitter edge. They are built for everyday use: pizza, pasta, marinara, and finishing heat anywhere a dish needs a lift of warmth without complexity.
People confuse them because both are red, both are dried chiles, and both come in flake form. But the flavor profiles are different enough that the substitution changes the dish. Gochugaru in an Italian marinara tastes too sweet and complex. Red pepper flakes in kimchi taste too harsh and one-note, and the color is duller.
Can I Substitute Red Pepper Flakes for Gochugaru?
Not cleanly, but you can approximate the heat. If a recipe calls for gochugaru and you only have red pepper flakes, the result will be hotter, less sweet, and visually duller. Use about half the amount the recipe calls for and add a small pinch of smoked paprika to mimic the smokiness. Expect a sharper, more direct heat and a brownish-red color instead of the vivid crimson that gochugaru gives. For dishes where color and sweetness matter, like kimchi or a Korean stew, the substitution falls short. For a quick marinara or a finishing sprinkle, it works in a pinch.
The reverse substitution is trickier. If a recipe calls for red pepper flakes and you only have gochugaru, you will get less heat and a sweeter, more complex flavor. Use a bit more than the recipe calls for and expect the dish to taste different, milder, and fruitier. For pizza or pasta, it works if you want a gentler, sweeter heat. For a dish that needs a sharp kick, gochugaru will not deliver.
How to Use Each
Gochugaru is the base of kimchi, the crimson seasoning paste that coats the cabbage and ferments into funk and depth. It goes into Korean stews (jjigae) and soups (jjampong), marinades for grilled pork and beef, and the fine powder is mixed into gochujang. Because the heat builds gradually, you can add it early for color and a base layer of warmth, or stir in more at the end to dial up the kick. Pair it with something cooling like cucumber or yogurt and it softens further. It is forgiving, and that slow-building warmth is what makes it accessible.
Red pepper flakes are the everyday finishing heat for pizza, pasta, and anything Italian or Italian-American. Bloom them in oil or butter at the start of cooking to release the capsaicin and pepper flavor into the fat, which then carries that warmth evenly through the whole dish. That is the trick behind a good chili oil or an aglio e olio. Sprinkled on raw at the end, the heat stays in concentrated bursts and the flavor is fresher. Many cooks do both: a little in the pan for background warmth, a little at the table for brightness. They are endlessly useful on roasted vegetables, in soups and beans, stirred into honey for hot honey, or shaken onto eggs and avocado toast.
FAQ
Can you substitute red pepper flakes for gochugaru?
You can, but the result will be hotter, less sweet, and visually duller. Use about half the amount the recipe calls for and add a small pinch of smoked paprika to mimic the smokiness. For dishes where color and sweetness matter, like kimchi or a Korean stew, the substitution falls short. For a quick marinara or a finishing sprinkle, it works in a pinch.
What’s the difference between gochugaru and red pepper flakes?
Gochugaru is made from a specific Korean pepper, deseeded before grinding, and sun-dried slowly to concentrate sugars and develop a fruity, smoky sweetness. Red pepper flakes are a blended product made from multiple chile varieties, crushed with the seeds left in. Gochugaru is milder, sweeter, and more complex. Red pepper flakes are hotter, simpler, and built for everyday use.
Is gochugaru spicier than red pepper flakes?
No. Gochugaru is milder, typically 1,500 to 10,000 SHU, with a slow, building warmth. Red pepper flakes are hotter, typically 15,000 to 30,000 SHU, with a sharper, more direct heat. The confusion comes from the fact that both are red dried chiles, but the processing and pepper variety make the heat profile different.
Why does gochugaru have such vivid color?
The peppers are deseeded before grinding, which removes the bitter white membrane and lets the bright red pigment dominate. The best gochugaru is sun-dried slowly over a week or more, which preserves the carotenoid pigments and develops a sweeter, more complex flavor. Industrial hot-air drying is faster but can degrade the color and flatten the flavor.
Can I use gochugaru on pizza?
You can, but it will taste different. Gochugaru is milder and sweeter than red pepper flakes, so you will get less heat and a fruitier, more complex flavor. If you want a gentler, sweeter heat, it works. If you want the sharp kick that belongs on a pizzeria table, stick with red pepper flakes.