A method for modifying the resilience of a flexible layer having a predetermined footprint and to be formed from a predetermined amount of edible material is described. The method includes increasing the thickness of the flexible layer whilst maintaining the predetermined amount of edible material and the footprint of the flexible layer. In one embodiment, increasing the thickness involves moulding in a flowable form the predetermined amount of edible material in a mould, the mould including a moulding region of substantially the same footprint as the flexible layer with the moulding region including at least one projection extending from the moulding region. The predetermined amount of edible material is then allowed to set.