Hostess CupCake Day is celebrated annually on May 11 in the United States to honor the first sale of Hostess CupCakes, which were originally known as Chocolate Cup Cakes, produced by the Taggart Baking Company. The cupcakes gained immense popularity, with sales reaching 400 million in a single year and increasing to 600 million later on. The distinct features of Hostess CupCakes, such as the white squiggles on top and the vanilla crème filling, were developed in the 1950s. After several ownership changes, Hostess CupCakes are now produced by Hostess Brands and remain a favorite among consumers. Typical customs for this day may include enjoying Hostess CupCakes as a treat or sharing them with friends and family to celebrate their enduring legacy in the dessert world.