NYT Cooking: Maida Heatter, the legendary dessert-cookbook author, tested this recipe 20 times before deeming it good enough for publication in The Times in May 1972. Her toil was worth the trouble: Eight months later, it was named the paper’s most requested dessert recipe of the year. This is an adaptation of the version that appears in Ms. Heatter’s book “Happiness is Baking” (Little, Brown, 2019). It beg...