Red pepper flakes substitutes

Finely ground dried cayenne chilli, the same pepper most flakes are made from, just milled fine.

Best for

pasta sauces, soups and chilli, marinades, dry rubs, anything already blended and smooth

The closest match on flavour, because it is usually the same chilli. What changes is entirely how the heat arrives. Ground cayenne dissolves into the dish and spreads the heat evenly, so it hits sooner, feels stronger and lingers, while flakes sit in pockets and give you an occasional hot bite. That is why you halve it. You also lose the red flecks, so a finished pizza or a plate of aglio e olio looks plain. Add it early enough to disperse, and taste before adding more, because there is no undoing it.

Sun-dried Korean chillies, deseeded and ground coarse, brilliant red and much milder than cayenne.

Best for

stir-fries, noodle dishes, soups and stews, roasted vegetables, eggs

Excellent all-round swap and the best one if you want colour as well as heat, because gochugaru is a far brighter red. What changes: it is noticeably milder, distinctly fruitier and faintly sweet with a whisper of smoke, so a bowl of pasta made with it tastes rounder and less sharp. That is lovely in a savoury braise and wrong on pizza, where you want the sudden jolt. Because it is milder you need more, and because you need more, the flavour becomes noticeable rather than background.

Coarsely ground Syrian and Turkish chilli, slightly oily, deep brick red and only gently hot.

Best for

finishing dishes at the table, roast vegetables, hummus and labneh, grilled meat, flatbreads

The most flavourful substitute and the one that makes food taste better rather than just hotter. What changes: Aleppo is mild, raisiny and faintly sour, almost like sun-dried tomato, so it adds a fruity depth that plain flakes do not have. A pasta arrabbiata made with it is more interesting but much less fiery, so if the heat itself was the point, this will disappoint. It is a superb finishing sprinkle where flakes were being used purely as a garnish.

Any dried red chilli such as arbol, Kashmiri or generic dried red chilli, snapped up in your fingers or pulsed briefly.

Best for

pizza and pasta, chilli oil, stir-fries, any use where the flake texture matters

This is not really a substitute, it is the same product made ten seconds earlier, and it is the only option that reproduces the burst-of-heat texture exactly. Snap the pods into a bowl with your fingers, including the seeds, or pulse them a couple of times in a spice grinder. What varies is heat: arbol is hotter than average flakes, Kashmiri and generic supermarket dried chillies are usually milder, so crush a little, taste a fragment, then commit.

A fresh serrano, red jalapeno, Fresno or bird's eye, seeded to taste and chopped small.

Best for

sautes and stir-fries, sauces cooked from scratch, curries, salsas

Works well when the chilli goes into the pan early with oil and aromatics. What changes: fresh chilli is grassy, bright and juicy rather than dry and slightly bitter, so the dish tastes livelier and less deep, and it brings water with it. That extra moisture is invisible in a tomato sauce and a real problem in a dry rub, a spice blend or anything you are trying to crisp. Never use it as a finishing sprinkle in place of flakes, because raw chunks of fresh chilli on top of a pizza are a completely different eating experience.

Any thin vinegar-based hot sauce such as a Louisiana-style cayenne sauce, used only where liquid is acceptable.

Best for

soups and stews, braises, chilli, marinades, salad dressings

Genuinely useful in wet dishes and genuinely bad in dry ones, so this belongs at the bottom of the list. What changes: hot sauce is mostly vinegar, water and salt, so it adds sourness and saltiness alongside the heat and dilutes whatever you put it in. A pot of chilli absorbs that happily. A dry rub turns to paste, a spice-crusted piece of fish will not form a crust, and popcorn goes soggy. If you are using it, pull back any other vinegar in the recipe and taste for salt.

The pre-mixed Tex-Mex blend of mild ground chilli with cumin, oregano, garlic and salt.

Best for

chilli con carne, tacos, bean dishes, Mexican-style stews

The least reliable swap, because it is mostly not chilli. What changes: you are adding cumin, oregano and garlic along with the heat, which is delicious in a pot of chilli and completely wrong in an Italian pasta or on a pizza, where the dish will suddenly taste faintly of tacos. It is also much milder, so you need roughly three times the volume, by which point the extra spices are unmistakable. Note that British and Indian shops sell chilli powder that is pure ground chilli with no blend at all, and that version behaves like cayenne, so use half a teaspoon rather than a tablespoon.