How many onces in 1 cup of chili powder?

Your question seems to be based on a misconception. Ounces are a unit of weight or mass, and 'once' is not a standard measurement of quantity. Chili powder is typically measured by volume, such as tablespoons, teaspoons, or cups. If you are looking to measure out a specific amount of chili powder, you should use a measuring spoon or cup to ensure accurate results.