This salted caramel apple cake is a delicious homemade recipe that is perfect for fall. The cake layers are made with a combination of all-purpose flour, baking powder, salt, sugar, eggs, milk, and butter. The caramel sauce is made with sugar, heavy cream, and sea salt. The apple filling is made with apples, sugar, cinnamon, and nutmeg. To assemble the cake, you will need to spread the apple filling between the layers and pour the caramel sauce over the cake. The result is a moist and flavorful cake with a perfect balance of sweet and salty flavors. This cake is perfect for a fall party or a sweet treat after dinner.