Mt favorite Chile powder recipe by Alton Brown
3 Ancho Chiles, stemmed, seeded and sliced
3 Cascabel Chiles, stemmed, seeded and sliced
3 Arbol Chiles, stemmed, seeded and sliced
2 T garlic powder
2 T whole cumin seeds
1 T dried oregano
1 top. Smoked paprika
Place all the Chiles and cumin in a cast from skillet over med-high heat. Cook 4-5 min moving constantly. Cool these Chiles, place in a blender along with garlic powder, oregano and paprika. Process into a fine powder, let it settle before opening. Store in an airtight container.
To substitute other Chile peppers is fine. I'd read up on the characterristics of the peppers called for and adjust accordingly. This is not hot spicewise, but good aromatics for basic chili/tacos. Add hot pepper as you prefer separately.