A regular coffee is 1 cream and 1 sugar, so the sentence in the first panel is a command. He's even pointing at the guy while he says it. The nasty racist then backtracks when he notices the barrista's cold dead stare and realizes he is large enough to snap him in half.
I'm just joking around, but really the more I think about that first panel, the more it annoys me.
edit: I wasn't seriously considering this a racist comic, but pointing out a widely used label and grammar will make the first panel hilariously ironic to many people.