This caramel apple cake recipe is perfect for fall. The cake is moist and flavorful, and the caramel frosting is sweet and buttery. To make the cake, you'll need flour, sugar, baking powder, salt, cinnamon, eggs, oil, vanilla extract, and apples. For the frosting, you'll need sugar, milk, butter, and vanilla extract. The cake is baked in one layer and then frosted with the caramel frosting. It's perfect for serving with a cup of hot apple cider on a crisp fall day.