I made an apple fritter cake today, and found I was out of cinnamon halfway through. Guess what? The vitamix turned cinnamon sticks to an amazing, fragrant, dark cinnamon. I’m kind of loving this- it has a bit of texture to it.
You definitely could, but you would want to use just a sliver of a cinnamon stick, and your smoothie might start to heat up before the stick was completely ground. I found this left my jar cloudy though, so bought a cheap spice grinder for future use.