Most hot honey starts with one of two things: a wildflower honey or a clover honey, both selected because they're affordable, mild, and don't have strong floral notes that would compete with the chili. A few producers go more particular — Tutto Calabria uses orange blossom; Mike's Hot Honey, as of 2017, sourced wildflower from a single supplier with about 4,000 hives in Jefferson County in upstate New York. The base honey question matters more than most casual buyers realize: a thin, mass-produced honey will give you a thin hot honey no matter how good the chili is. A characterful base honey gives the heat something to ride on.
The chili work is where producers diverge. Some — Bushwick Kitchen, Savannah Bee, Nate's — use oleoresin habanero, an extracted concentrate of habanero pepper. Oleoresin gives consistent heat with no visible pepper material in the finished honey, which makes for a clean amber bottle on the shelf. Others use whole or sliced peppers and let them steep. Tutto Calabria steeps Calabrian peppers in their honey for extended periods. Mike's Hot Honey uses chili peppers imported from Brazil, chosen specifically because the heat profile lands on the back of the palate after the sweetness; the actual recipe and pepper variety remain proprietary.
The infusion itself is a low-and-slow operation. Honey is heated gently — usually well under 180°F to preserve enzymatic activity and floral character — and the chilies steep until the producer hits their heat target. Some recipes add vinegar (apple cider is common; Mike's includes vinegar in their published ingredients) which extends shelf life and adds a subtle brightness that keeps the finished product from feeling cloying. The peppers are usually strained out before bottling, though a few craft producers leave them in for visual effect and continued infusion.
Heat tuning is mostly empirical. There's no industry-standard Scoville rating for finished hot honey — pepper variety, infusion time, sugar content, and personal palate all interact in ways that defy clean measurement. Producers taste, adjust, taste again. Most settle on a heat level they consider "honey-first with a kick." A few — Elijah's Xtreme and Fuego Spice are two — use Carolina Reaper peppers (the world's hottest, technically) but moderate the heat with sugar load and end up at what they themselves call medium intensity. The lesson there is that pepper choice is only one variable. How much, how long, what base, what dilution — those decide the final heat as much as the pepper does.