7-Eleven, Inc. has announced the return of the limited-edition April Fools’ Month Mystery Donut. Available at participating 7-Eleven, Speedway and Stripes locations throughout the month of April, customers are invited to take a guess at the donut’s surprise flavor.

Built as a Bismark-style donut, what’s inside remains a secret, with one bite revealing a sweet treat or an unexpected flavor twist.

“Every April, we like to add a little mischief to our bakery offerings with the Mystery Donut as an unexpected twist that’s all about surprising our customers in the spirit of April Fools’ Day,” says Brandon Brown, senior vice president, fresh foods at 7-Eleven, Inc. “It may seem like a prank, but it’s no joke! This mystery donut is hitting stores, offering a fun and unexpected treat to shake up your day!”