FoFa says:
"For a quick flavor pickup on your normal coffee, try this. Start with the measure here, and move up or down depending on your preference. If you like flavored coffee, this is pretty good. If you are a regular black drinker, I find most do not like flavored coffee to start with, and also don't like this."
Your regular coffee
1/4-1/2 Teaspoon ground cinnamon
Make your coffee just like you usually do. Sprinkle some ground cinnamon over the top of the coffee, brew as normal.