Have you ever heard of a Buche de Noel? Or maybe a "yule log" ? It's not very common here in the U.S., but it is a traditional dessert served during the Christmas holidays in many French-speaking countries. It celebrates the winter solstice and Christmas by representing a log burning in the fireplace.
Because the pastry school I attended teaches French culinary skills, we learned how to make a Buche de Noel.
It is a sponge cake filled with chocolate mousse, rolled tightly like a jelly roll, and then frosted with chocolate buttercream. It is often decorated to look like a log by making bark lines in the buttercream, as well as placing meringue mushrooms and marzipan holly leaves on it.
Click the link above to get the recipes and directions for making your own Buche de Noel. If you have any questions, please ask!! I hope see pictures of the yule logs you make!