1 part chili powder
1 part ground cumin
1 part garlic powder
1 part onion powder
1/4 - 1/2 part crushed red pepper
Mix all ingredients together and store in an airtight container. I store mine in a pint sized mason jar. You can store this in the fridge or freezer to maintain freshness if you don't use in a short amount of time.
We go through a lot of this in my house, so I tend to make the 1 part = 1/2 cup or whole cup measure. That way I always have it on hand. If you are looking to just make a small amount to try it out, start with 1 part = 1 Tbsp. I guarantee you will make more in no time at all!
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