Even the USPS thinks so. Notice the chili peppers on the top.

From the usps website:

Artist Steve Buchanan, of Winsted, Connecticut, created each of the five stamp designs. As reference, he used slide photographs made by his wife Rita Buchanan’s research in the late 1970s on indigenous agricultural methods in the southwestern United States. The crops depicted in the stamps – corn, chili peppers, beans, squashes, and sunflowers – had been cultivated in the Americas for centuries when Europeans first arrived in the New World.

Now, while this is not ALL chili peppers, it is a start.

If you want ALL chili peppers on your stamps, you can have them.

No, really.

But, it’ll cost ya.

Below you will find a customized chili pepper stamp I created at PhotoStamps.com. Note that the price is $17.99 per sheet. Yep. A little pricy, but it’s ALL chili peppers. If you use a lot of stamps, this actually becomes a more reasonable venture, as the price decreases with the more stamps you buy. Either way, I think it’s cool that you can create your own stamps.

NOTE: I typically spell peppers as chile, instead of chili. But, because the usps lists them as chili, I have used that for continuity.