Flip it. Flip it real good.
Good Housekeeping’s Book of Salads illustrated by Selma Quateman.
From the book “Wild Fowl Game Cookery” by Frank Kohler, published in 1961 (via CreativePro)
Fun fact: Prune Whip was President Dwight Eisenhower’s favorite dessert. Try it yourself by following this recipe from 1955 (via Found in Mom’s Basement)