trifle: [13] Trifle was acquired from Old French truffle, a derivative of truffe ‘trickery, deceit’ (it is not known where this came from; it has no connection with English truffle, which may come ultimately from the same source as tuber). The first record of its application to a ‘sweet dessert confection’ dates from the end of the 16th century.
trifle (n.)
c. 1200, trufle "false or idle tale," later "matter of little importance" (c. 1300), from Old French trufle "mockery," diminutive of truffe "deception," of uncertain origin. As a type of light confection from 1755.
