This Chocolate Swirl Upside-Down Cake is a unique twist on a classic marbled dessert—gluten-free, soy-free, gum-free, and full of rich chocolate flavor. Unlike most marbled cakes, this one flips tradition—literally. Topped with a chocolate whipped cream and baked in a cast iron skillet, it delivers soft texture, bold flavor, and a beautiful presentation. The full recipe and all the tips for customizing your swirl are available now on the blog.