Article continues below The truly huge slice of cake has come a long way and is now known as Bertha, but besides this, the Leeds-born bakery has also become a go-to for cookies, pies and inspired ...

Cut the cake lengthways into three strips, then cut across each strip to give nine 7x3cm/2 ¾ x1½in slices. Cut each slice in half horizontally ready for filling as you would a sandwich.