The primary ingredient in a traditional English trifle is sponge cake, often referred to as "ladyfingers" or "pound cake." The trifle is a layered dessert that typically includes layers of sponge cake soaked in sherry or fruit juice, custard, fruit, and whipped cream. Each layer adds to the dessert's overall flavor and texture, making trifles a popular choice for gatherings and celebrations in England. The origin of the trifle dates back to the 16th century, and its preparation can vary widely, allowing for creative adaptations while maintaining the essential sponge base.