With these tutorials as a jumping off point, I started reworking a piece with three bundt cakes. Previously, I had used mountain nodes and cookies to model in the divots in a real cake that come from air bubbles bursting against the pan. I could not use a proper subsurface shader on this model because the mesh was so terrible and it took an ungodly amount of time to render. Now I'm using VDBs to create the holes in the mesh and it's coming out much cleaner. I can also make moon rocks!