Mulato Chile Peppers This page first published: Sep 2, 2002 · Updated: Oct 4, 2020 · by CooksInfo. Copyright © 2021 · This post may contain affiliate links · This blog generates income via ads · Mulatos are Poblano Chile Peppers that have been allowed to ripen until dark brown, then dried out to a wrinkly, flat blackish-brown pepper. They remain that dark brown colour after rehydrating. The flavour almost has undertones of chocolate.