An apparatus for formation of products comprising an edible material and an interleaver, the apparatus including a drum with mould cavities, each with a bottom and a sidewall, in which the edible material is formed. The apparatus including an interleaver storage having one or more interleavers, and a transportation means configured to transport the one or more interleavers from the interleaver storage to a circumference of the drum where the edible material is placed on the interleaver. The bottom and/or the sidewall is made from a porous material and pressurized gas is forced through the porous material to eject the edible material from the mould cavities. After ejection, the products are stacked such that one interleaver is between two edible materials.