Chili powder is a spice blend made from ground dried chili peppers, often combined with other ingredients like cumin, garlic powder, onion powder, and sometimes paprika or oregano. The primary flavor of chili powder is a combination of heat and earthiness, though the specific flavor profile can vary depending on the types of chili peppers used. It is commonly used to add depth and spiciness to dishes like chili, stews, tacos, and barbecue.