Hot fudge sauce has a sweet and indulgent history that traces back to the early 20th century in the United States. Emerging as a popular dessert topping, hot fudge sauce gained prominence in ice cream parlors and soda fountains during the 1920s and 1930s. The rich and gooey sauce, typically made from ingredients like chocolate, sugar, butter, and cream, became a beloved accompaniment to ice cream sundaes, adding a decadent layer to the world of sweet treats.