I was asked to make a giant Oxo cube for a 70th birthday cake for a gentleman who always asks for a cup of beef oxo wherever he goes!! This cake is 10" square and filled with jam and buttercream! I could barley lift it. The mug of Oxo is made from rice crispy treats and the Oxo cubes are fondant – everything is edible including the wood effect on the cake board! As with every cake I made, I learnt a few very valuable lessons making this cake so next time I know that I can do better!