From the cocktail laboratory in Foster: I was looking for a cool, non-alcoholic midday drink, and thought, Why not, like Jim says, start with two ingredients you already love?
Which would be coffee (#1!) and ginger beer (one of the two essentials in a Dark and Stormy), over ice.
WINNER! Wedded bliss. Conjugal harmony! Caffeine with bite. I'll have another.
Half and half to start, so you can tell which ingredient needs boosting or weakening. But it's pretty good at half and half. The two botanicals go well together, coffee and ginger. Lucky me, I have locally from Hosner's, an eastern CT soda maker, something called "Dangerous" ginger beer, with a serious overbite.
Experiment. Try it with cream. Try it with rum. Try it with Kahlua.