Utopia Parkway: The Life and Work of Joseph Cornell by Deborah Solomon:
Cornell’s eating habits did little to assuage his stomach problems. He loved sweets, so much so that, in later life, he was rumored to subsist on nothing but doughnuts. Already his craving for sugar was manifest. In one of his few surviving letters from this period, Cornell reported with great enthusiasm that his mother had set up a “luxury shelf” in the icebox reserved exclusively for heavy cream and other goodies. Futhermore, he noted, he “finished off [a] jelly roll from Sandwich this morning with best creamery butter.” Cornell possessed the child’s predilection for sweets, an indulgence for which his chronic dyspepsia was perhaps self-willed penance.