We made this early this spring, and brought them as a "taste" to a wild weed walk we took with Blanche Derby in Massachusetts. She gives samples of prepared dishes along with her tours to really show people what they can do with the wild food they just learned about in the field. We made something completely out of season for spring, but we used wild food we had gathered and preserved last autumn.
The wild grape (Vitus species) jam was also produced last autumn from various species of wild grapes that we find growing along field edges and near water. It is the tastiest jam we make, along with being the most popular. I say it is an adult grape jam, although there is no alcohol involved. The flavor is so much more intense than the stuff you get at the store, and the flavor improves with age, like wine. The jam was added to a softened cream cheese and butter mixture, along with a bit more confectioner's sugar to make the frosting, and I also hollowed out the cupcakes and added a dollop of straight jam for an intense flavor burst.
This recipe is available in our book, available Spring 2016.