But! A recent study published in The New York Times insists that a flash-freeze might ultimately benefit your brew. It turns out that freezing coffee beans before grinding them helps the beans break down more evenly, which is important because the size of the grind affects the rate at which water extracts their flavor during brewing.
Too-small particles can create a sour taste, while the too-big ones make for an overly bitter cup. You want the Goldilocks grind: juuuuust right.