The launch is expected to bring new consumers into the category, as well as extend the repertoire of current consumers who want new and interesting flavours from the cake aisle.
A Double Choc Mini Mini Rolls variant has also been launched a moist chocolate-flavoured sponge with a crème swirl covered in milk chocolate.
Senior brand manager Sarah Burnett said: "This is the biggest launch in cake bars for a long time. Boost is a high-energy brand, which appeals to young adults, and we are really excited to see how the cake bar performs given the exceptional results it has achieved in consumer trials."
Double Choc Mini Mini Rolls have an RSP of £1.99 while the cake bars have an RSP of £1.45.