I think its some type of painting. I'd really like to know too.
Do you have a larger picture? I can't see it to figure it out.
double post ops my bad
It looks hand-painted to me.
It looks like it was painted on to me as well - maybe use some petal dust mixed with vodka or clear extract and paint them on.
It sure looks hand painted or probably to use edible markers.
I think it's edible markers, too.
It looks painted. I have also used an edible image with plaid printed on it.