Crushed Red Pepper

Crushed red pepper is typically a mixture of a few different kinds of dried chiles.  It can be fairly hot for those who are not acclimated to spicy food, so use some caution in how much you use until you have determined the tolerance of the audience.  The recipes I write will usually give a range, with the low end being suitable for low-spice eaters, and the high end being suitable for those who have moderate tolerance.  Those with higher tolerance generally already know who they are, and they can ramp it up however they like.