Choosing a chilli for a hot sauce is a question of flavour first and heat second, because every chilli brings a distinct character before it brings any burn at all. Jalapenos are green and grassy, chipotles are smoky and sweet, habaneros are floridly tropical, piri piri is sharp and bright, and the heat each one carries is really just the volume knob on top of that. Pick the flavour you want the sauce to taste of, then adjust the heat with quantity and blending.
That is the opposite of how most people shop for chillies, which tends to be a straight race up the Scoville scale. It is also why so many homemade sauces end up tasting of nothing but pain. Here is what the main varieties actually bring to a bottle, how the heat scale works, and how to blend them into something you will still want to eat in a fortnight.
How should you choose a chilli for a sauce?
Start with the finished sauce you have in mind. A bright green sauce for tacos and eggs wants fresh, grassy chillies. A dark, savoury sauce for pulled pork wants smoke and depth. A fruity, fierce sauce for jerk-style cooking wants the tropical top notes only the hottest varieties really provide.
Then think about form. Fresh chillies give brightness, moisture and a lively, vegetal flavour. Dried chillies give concentration, sweetness and depth, along with the leathery, raisin-like complexity that develops as they dry. Dried are also far more practical for home sauce making, since they keep for months and are available whatever the season is doing.
Finally, be realistic about who is eating it. A sauce nobody in the house dares open is not a successful sauce. You can always add more chilli, and you can never take it out.
Which chillies do what?
The Chilli Sauce Making Kit is built around dried chillies and flakes covering a wide spread of heat and flavour, and they make a good tour of the varieties worth knowing.
- Green chillies. The gentle end, and the best starting point for anyone who wants flavour more than fire. Grassy, fresh and a natural fit for a salsa verde style sauce.
- Jalapeno. Mild to moderate, with a crisp vegetal flavour that most people already recognise. Reliable, friendly and endlessly useful.
- Chipotle. A jalapeno that has been left to ripen red and then smoked, which is why it tastes of woodsmoke, tobacco and dried fruit. It brings depth that no other chilli quite matches, and it is the backbone of a good smoky sauce.
- Cayenne. The workhorse. Clean, sharp, straightforwardly hot without a lot of fuss, which makes it ideal for a Louisiana style sauce where vinegar and salt do the rest.
- Facing heaven. A Chinese chilli named for the way it grows pointing upwards. Aromatic and nutty as much as hot, and it belongs in the serious end of the heat range.
- Piri piri. Small, bright and properly fiery, with a citrusy sharpness that suits the classic Portuguese style sauces built on lemon, garlic and herbs.
- Habanero. Distinctly tropical and floral, almost apricot-like, and hot enough to demand respect. It is the natural partner for mango and other sweet fruit, which is why that pairing turns up on hot sauce shelves everywhere.
Between them those cover the useful spectrum: fresh and green, smoky and deep, clean and hot, and fruity and ferocious. Most sauces you can think of are a variation on one of those four directions.
What does the Scoville scale actually measure?
It measures capsaicin, the compound responsible for chilli heat, and originally it did so by dilution. In the original test, a chilli extract was diluted with sugar water until a panel of tasters could no longer detect the burn, and the number of dilutions needed became the rating. Modern testing uses laboratory analysis and converts the result, which is rather more reliable than a committee of increasingly numb volunteers.
Useful as it is, treat the numbers as a broad guide rather than gospel. The same variety can vary enormously depending on where it was grown, the weather that season and how ripe it was picked. Our own guidance is deliberately simple: the milder chillies for gentle sauces, the hotter ones for serious heat, and taste as you go.
One more piece of chilli anatomy worth knowing. Most of the capsaicin is not in the seeds, it is in the pale pithy membrane the seeds are attached to. Removing seeds and pith together does bring the heat down, while picking out seeds alone achieves less than people hope.
How do you blend chillies into a balanced sauce?
Think of it as a base and a top note. Build the body of the sauce from a milder chilli, which gives you volume, colour and flavour without runaway heat, then lift it with a small amount of something hotter or smokier for character. A sauce that is 80 per cent jalapeno with a whisper of habanero is a far better thing than a sauce that is all habanero.
Balance the rest with the classic three: acid, salt and sweetness. Vinegar or citrus keeps a sauce lively and helps its keeping quality, salt makes everything taste of more, and a little sugar or honey rounds off the sharp edges. Most of the recipes we develop lean on all three, and each one asks for a few fresh ingredients alongside the chillies, whether that is mango and onion, tomatoes and garlic, or lemon, basil and red pepper.
Some practical habits. Wear gloves whenever you handle chillies, since the oils cling to skin and sting badly if you touch your face afterwards. Taste as you build rather than only at the end, which is what the tasting pipettes in our seven sauce kit are for. Blend for a smooth sauce, and press it through a fine sieve if you want it smoother still. Then bottle through a funnel into clean glass, label each bottle with the sauce and the date, and refrigerate once opened.
Chilli variety FAQs
Which chilli should a beginner start with?
Green chillies or jalapenos. They give you a proper chilli flavour with manageable heat, so your first sauce is something you will actually finish.
Are dried chillies hotter than fresh ones?
Weight for weight, yes, because drying removes water and concentrates everything else. That is why a small handful of dried chillies goes much further than it looks like it should.
What is the difference between a chipotle and a jalapeno?
They are the same chilli at different stages. A chipotle is a jalapeno left to ripen to red and then smoked, which transforms it into something sweet, smoky and deep.
Can I use chillies I have grown myself?
Absolutely. Reuse the recipes with your own dried chillies, and just bear in mind that heat levels vary with variety, growing conditions and season, so taste as you go.
Is a homemade chilli sauce suitable for vegans?
Ours are. The chilli sauce kit is vegan, gluten free and lactose free, and all seven sauces are built from plants, vinegar and store cupboard ingredients.
Fancy working through the whole spectrum? Browse our chilli sauce making kits.
