Rich sea-salted dulce de leche buttercream will wow your taste buds in this Salted Caramel Popcorn Cake (aka Crunch 'n Munch Cake). Along with three brown sugar cake layers it supports a pile of caramel corn, honey-roasted peanuts and dulce de leche drizzle. Read the recipe notes for additional information, and what to expect when baking and assembling this cake.