Barmy in Wonderland is a novel by P. G. Wodehouse, first published in the United Kingdom on 21 April 1952 by Herbert Jenkins, London, and in the United States on 8 May 1952 by Doubleday & Company, New York, under the title Angel Cake. The novel may be considered part of the expanded Drones Club canon, since the main character Barmy Fotheringay-Phipps is a member of the club.

Wodehouse adapted the novel from a play, The Butter and Egg Man (1925), by George S. Kaufman and, echoing Shakespeare's dedication of his Sonnets, dedicated the US edition to "the onlie begetter of these insuing sonnets, Mr G S K".

The central character is Cyril "Barmy" Fotheringay-Phipps (pronounced "Fungy Fips"), an amiable young Englishman who falls in love with a spirited American girl named Eileen "Dinty" Moore and finds himself suddenly thrown into the daunting world of Broadway theatre after investing in a play.