This salted caramel layer cake recipe is a beautiful dessert that is perfect for any special occasion. The cake layers are made with a rich, buttery batter that is flavored with vanilla and brown sugar. The frosting is a creamy, salted caramel buttercream that is made with homemade caramel sauce. The cake is finished with a sprinkle of sea salt, which adds the perfect amount of saltiness to balance out the sweetness of the cake.