The hottest chilli in the world is Pepper X, which Guinness World Records measured at 2,693,000 Scoville Heat Units in October 2023. It took the title from the Carolina Reaper, which had held it for ten years.
That is the answer. But it is not the interesting part, and it is almost certainly not the chilli you should be cooking with. Here is the whole ladder, and where the scotch bonnet — the chilli my food is built on — actually sits on it.
What a Scoville rating actually measures
The Scoville scale was invented in 1912 by an American pharmacist, Wilbur Scoville. His original method was blunt: dissolve a chilli extract in sugar water, and keep diluting it until a panel of tasters could no longer detect any heat. If it took a thousand dilutions before the burn disappeared, the chilli scored 1,000.
Modern labs no longer use a panel of people. They measure the concentration of capsaicin — the compound that produces the burn — and convert it into the same units, so the number stays comparable to the old scale.
Two things follow from that, and both matter when you read any chilli list including this one.
First, Scoville measures one thing only: pungency. It says nothing about whether a chilli tastes of anything. Second, the numbers are ranges, not fixed values. The same variety grown in different soil, in a different season, picked at a different moment, will test differently. Anyone quoting a single exact number for a garden chilli is being tidier than the truth allows.
The ladder, from mild to absurd
| Chilli | Scoville Heat Units |
|---|---|
| Bell pepper | 0 |
| Jalapeño | 1,000 – 4,000 |
| Cayenne | 30,000 – 50,000 |
| Scotch bonnet | 100,000 – 350,000 |
| Habanero | 100,000 – 350,000 |
| Ghost pepper (bhut jolokia) | around 1,000,000 |
| Carolina Reaper | 1,600,000 – 2,200,000 |
| Pepper X | 2,693,000 |
Pepper X and the Carolina Reaper were both bred by the same man, Ed Currie, in South Carolina. He spent about a decade developing Pepper X before it was certified. These are not chillies that turned up in somebody's grandmother's garden. They are engineered for a number.
Where the scotch bonnet sits
Between 100,000 and 350,000 SHU. That is roughly fifty times hotter than a jalapeño, and roughly ten times cooler than a Carolina Reaper.
Which is to say: properly hot, and nowhere near the top of the list. That is exactly why it is the chilli that entire cuisines are built on and the superhots are not.
Scotch bonnet or habanero — is there a difference?
They are the same species, Capsicum chinense, and they share the same heat range. If you swap one for the other the dish will be about as hot either way.
The difference is flavour and shape. A scotch bonnet is squat and round — it is named for a tam o' shanter hat — and it is noticeably fruitier and sweeter, with something almost apricot behind the burn. A habanero is more elongated, and leans smokier and more floral.
That fruit is why the scotch bonnet ended up in Caribbean cooking and stayed there. It is not there to hurt you. It is there because it tastes of something.
Why I do not cook with the hottest chilli in the world
People sometimes ask me to make something hotter. I understand the instinct, but I think it is the wrong question.
Past a certain point, capsaicin stops being a flavour and starts being an injury. Your mouth floods, your eyes water, and whatever else was on the plate — the thyme, the lime, the garlic, the fruit in the chilli itself — is gone. You are not tasting the food any more. You are enduring it.
A superhot pepper is a dare. A scotch bonnet is an ingredient.
In Guadeloupe, where I am from, we use scotch bonnet in almost everything, and often the whole pepper goes into the pot unbroken so it perfumes the dish without releasing its full heat. That trick tells you what the chilli is for. We want the smell of it, the fruit of it, a warmth that builds. Not a punishment.
How to handle a scotch bonnet without regretting it
- Most of the heat is not in the seeds. It is in the pale membrane the seeds are attached to. Remove that and you remove most of the burn while keeping the flavour.
- Drop it in whole. Add an unbroken scotch bonnet to a stew or a pot of rice and fish it out before serving. You get the aroma and a gentle warmth, and nobody gets ambushed.
- Wear gloves, or wash properly afterwards. Capsaicin does not dissolve in water. Soap first, and keep your hands away from your eyes for a good while.
- If you overdo it, reach for dairy or fat, not water. Milk, yoghurt, coconut milk. Water spreads the capsaicin around; it does not wash it away.
So what should you actually buy?
If you want the record, it is Pepper X, and you mostly cannot buy it.
If you want to cook, you want a scotch bonnet — and honestly, you want it already balanced with the things that belong beside it. That is what our Caribbean Hot Sauce is: scotch bonnet with thyme, garlic and lime, the way it is used at home rather than the way it is used in a challenge video.
If you want to see it working in real dishes, start with the jerk chicken with rice and peas or the accras de morue. Both use scotch bonnet the way it is meant to be used: as flavour that happens to be hot, rather than heat that happens to be food.
