In a cup of warm water add sugar until it no longer dissolves then add a few spoonfuls more of sugar.
Drop in a small amount of graphite powder into the sugar water mixture. Stir it up well. There should be a thin black film on top of the liquid.
Let it set for a few days.
The sugar crystals will grow on the graphene surface similar to how rock candy grows.
The sugar crystals grow on the bottom of the floating film of graphite and once heavy enough the graphene and sugar crystal wafer will sink. And then the process repeats.
Is this possible with graphite powder in water as a film or is a thin solid piece of graphite necessary for sugar crystal growth?