The 3-ingredient French onion dip that empties every bowl

The recipe as presented leaves one ingredient unspecified in the available source material — a detail that would determine the exact final version. For those planning to serve it, the one confirmed variable within the cook’s control is the chilling time: the longer the dip rests before serving, the more developed the flavor. Whether it appears at a summer cookout or a winter holiday table, the bowl will likely need refilling.