"Make your own special blend of pain or pleasure. I make my own Chili powder to add an extra special original flavor to my chili. I tend to add many more types of dried chili peppers to the mix, last time I used 6 types - whatever the store has at the time. Also you may want to put saran wrap over the carafe before putting the top on and blending as if any of this fine dust gets in the air it will feel like you've been pepper sprayed (trust me on this one)."
Place all of the chiles and the cumin into a medium nonstick saute pan or cast iron skillet over medium-high heat. Cook, moving the pan around constantly, until you begin to smell the cumin toasting, approximately 4 to 5 minutes. Set aside and cool completely.
Once cool, place the chiles and cumin into the carafe of a blender along with the garlic powder, oregano, and paprika. Process until a fine powder is formed. Allow the powder to settle for at least 5 minutes before removing the lid of the carafe.
Store in an airtight container for up to 6 months.