Note: Aleppo-style pepper gets its name from the Syrian city of Aleppo although it's often sourced from Turkey or other countries. It has a deep red color and mild fruity flavor that's reminiscent of sun-dried tomatoes. Urfa biber is a Turkish chile from the Urfa region of the country. It's also flaky and mild but it has a much deeper maroon color. The flavor is slightly smoky and is more reminiscent of raisins. If you cannot find either one, try substituting another mild dried red chile that you crush yourself. In a pinch, you can substitute everyday crushed red pepper but it's much spicier, so use it sparingly.