quiche: [20] German kuchen ‘cake’ (a relative of English cake) is the original of quiche. In the dialect of Alsace it became küchen, which French transformed into quiche. The word found its way into English in the first half of the 20th century, but initially only as a specialist term for a somewhat recherché dish – before World War II, quiche Lorraine was exotic fare. It was the 1970s and the advent of winebar cuisine that made it much more widely familiar.
1949, from French quiche (1810), from Alsatian German Küche, diminutive of German Kuchen "cake" (see cake (n.)). Became fashionable 1970s; became contemptible 1980s.
