"the Mavrodaphne Trifle"

Mavrodaphne (sometimes written mavrodafni) is both a Greek grape variety and a type of wine made with that grape.

The dessert wine undergoes a maturation process and develops an unusual, rich reddish-brown colour.

Apparently, John Fothergill of the Spread Eagle Inn at Thame (referred to in bookmark p.57) was renowned for his Mavrodaphne Trifle.

Recipe for a traditional English trifle (to give it the 'Brideshead touch', just substitute Mavrodaphne for the sherry).