The release is the latest in a line of flavour-inspired creations including Kitkat Duos Mint + Dark Chocolate, Sweet Cinnamon, and Pumpkin Pie.
This release marks the third limited-edition flavor announced in 2020, following the success of Raspberry Crème and Lemon Crisp.
"Kitkat as a brand is internationally recognized for its inventive flavors," said Susanne Prucha, marketing director, Kitkat.
"Our US Kitkat lovers have continued to voice a longing for new and imaginative flavors and that's exactly what we're giving them in 2020.
“We've kicked off the year with not one, but three new flavor innovations and can't wait to announce what else we have in store."
The latest flavors come the Kitkat flavor innovation team which is constantly working to create new and exciting flavors throughout the year.
"Kitkat Birthday Cake delivers on the universal love of the layers of birthday cake flavor and aroma of frosting perfectly paired with the surprise crunch of sprinkles," said Justin Kukura, senior manager, chocolate product development, The Hershey Company.
Kitkat Birthday Cake comes in a standard 1.5 oz. bar (SRP $1.09).