This mango upside-down cake is a delicious twist on the classic pineapple version. The cake is made with a moist and fluffy vanilla cake batter, which is then topped with fresh mango slices and a sweet caramel sauce. The result is a beautiful and flavorful cake that is perfect for any occasion. To make this cake, start by making the caramel sauce by melting butter and brown sugar in a saucepan. Pour the sauce into a greased cake pan and arrange the mango slices on top. Then, make the cake batter by creaming butter and sugar together, adding eggs and vanilla, and mixing in the dry ingredients. Pour the batter over the mango slices and bake until golden brown. Once the cake is done, let it cool for a few minutes before flipping it over onto a serving platter. Serve warm with a dollop of whipped cream or vanilla ice cream.