Inspired by Kiteman's Conmuter Coffee, here is a ginger-spiced coffee. I'm using an espresso machine, but you could use any type of coffee maker for this by scaling the recipe and adapting it for the desired method.
Step 1: A word for espresso machine adicts
This Instructable may damage your espresso machine. Probably, most of baristas will not add anything than coffee in the filter basket: if you put fine granulated ingredients that can pass trough the head mesh, and have a reflux into your machine's head, it may harm your head, pipes or even boiler (I will dose the ginger between two layers of coffee so I will minimize the chances of wreking up my machine). This is not likely to happen, but you must consider this. I'm using an old Saeco machine, soon to be replaced.