This is Alton Brown's recipe for homemade chili powder. Once you've had fresh, you'll never go back. This chili powder will keep for about six months. Shop the Mexican aisle of your local grocery store to find these ingredients.
3 dried ancho chiles
3 cascabel chiles
3 arbol chiles
2 tbsp. whole cumin
2 tbsp. garlic powder
1 tsp. smoked paprika (or regular)
1 tbsp. dired oregano
Cut the top stem off the dried chiles and dump out all the seeds. Cut up the chiles and roast them, along with the whole cumin, in a pan to release the flavors. Remove from heat.
In a blender, combine all the ingredients and blend until a powder. Store in a jar for up to six months.