Paprika, oregano, cumin and garlic powder are some ingredients that are used to make chili powder. A recipe from All Recipes also includes onion powder and cayenne pepper. Alton Brown's chili powder recipe adds three different kinds of chili to the mixture.
For the All Recipes' chili powder, measure 2 tablespoons of paprika, 2 teaspoons of oregano, 1 1/2 teaspoons of cumin and 1 1/2 teaspoons of garlic powder. Also measure 3/4 teaspoon of onion powder and 1/2 a teaspoon of cayenne pepper. The cayenne pepper is an optional ingredient, making it possible to add to taste. Whisk all the ingredients together in a bowl and it is ready to use.
For Alton Brown's chili powder, stem, seed and slice 3 ancho chilies, 3 cascabel chilies and 3 dried arbol chilies. Place those and 2 tablespoons of whole cumin seeds into a medium nonstick saute pan or cast iron skillet over medium-high heat. Move the pan around constantly while cooking for about five minutes. Set the mixture aside and let it cool completely.
Once the mixture is cool, place it into the carafe of a blender. Add in 2 tablespoons of garlic powder, 1 tablespoon of dried oregano and 1 teaspoon of smoked paprika. Process the ingredients, forming a fine powder. Let the powder settle for a minute, and then remove the lid of the carafe. Store the chili powder in an airtight container for up to six months.