Sentence:  And suddenly the memory revealed itself. The taste was that of the little piece of <WSD>madeleine</WSD> which on Sunday mornings at Combray ... my aunt Léonie used to give me, dipping it first in her own cup of tea or tisane. 
Meaning of the word marked with <WSD> tags:  A French type of small gateau or sponge cake, often shaped like an elongated scallop shell.