The honest truth is, yes, red pepper flakes are spicy. But they’re also a huge liar. You see, the heat comes from a compound called capsaicin, and these flakes are basically a mixed bag of different peppers—mostly cayenne, but also some bell pepper seeds and dried flesh.
Here’s the curveball: the heat level is wildly inconsistent. One pinch might be a gentle hug, and the next bite is a slap in the face from a ghost pepper’s distant cousin. Ever noticed that? You’re not crazy; the flakes just aren’t uniform.
The Scoville Scale Shuffle
On the official Scoville Scale, red pepper flakes usually clock in around 15,000 to 30,000 Scoville Heat Units. That puts them in the same league as cayenne pepper—nothing to sneeze at, but way behind habaneros or ghost peppers. Think of them as the “entry-level daredevil” of heat.
But here’s the trick: the heat is mostly concentrated in the seeds and the inner white membrane (pith) of the pepper. Most commercial flakes include a ton of seed pieces, which is why you sometimes get a nuclear blast from a single fleck.
