The story
Coined by Mrs. John E. Cook of New Castle, Pennsylvania, USA, for a submission to a magazine recipe contest sponsored by gelatin maker Knox in 1904.
Etymology from Wiktionary, CC BY-SA 4.0.
perfection salad
Today it means: A terrine or jello-style vegetable loaf made with lemon vinaigrette flavored gelatin, filled with a chopped garden salad or green salad, popular in the United States during the early and mid 20th century. Full definition →