Hot chocolate is a hot drink used by the Tau'ri on Earth.
The clone of Colonel Jack O'Neill was given hot chocolate rather than coffee, because his clone was around thirty years younger than the original O'Neill. (SG1: "Fragile Balance")
In 2008, Kramer Innovations was giving away hot chocolate during their demonstration of a possible solution (later found unstable) for global warming, by cooling down the base. (ATL: "Brain Storm")