Historical clue formulations

• Dessert made with cocoa and egg whites — 2023-05-29
• Stuff between some cake layers — 2012-04-28
• Dessert not for the calorie-conscious — 2008-07-16
• Delicious diet-breaker — 2000-05-19
• Diet setback, maybe — 1996-11-07
• Menu dessert — 1993-12-09