This dessert is part chocolate cake, part flan and 100 percent mind-blowing. In this class we get two lessons and a bit of baking sorcery. The cake batter and flan mixture are layered in a Bundt pan and, by some degree of magic and science, they switch places and we end up with a flan-topped cake!
Position a rack in the center of the oven and preheat to 350 degrees F.
Spray a 10- to 12-cup nonstick Bundt pan with nonstick cooking spray. Pour in the 1/4 cup caramel sauce to evenly coat the bottom of the pan. Set aside.
For the chocolate cake: Whisk together the flour, cocoa, baking powder, baking soda and salt in a medium bowl until well combined; set aside.
Combine the butter and sugar in the bowl of a stand mixer fitted with the paddle attachment and beat on medium-high speed until light and fluffy, about 2 minutes. Reduce the speed then add the eggs, one at a time, mixing after each addition until fully incorporated. Scrape the bowl with a rubber spatula, as necessary.
Add one-third of the dry ingredients and mix on low speed until combined. Add 3/4 cup of the buttermilk and mix until combined. Repeat with another one-third of the dry ingredients and the remaining 3/4 cup buttermilk, ending with the remaining dry ingredients. Scrape the bowl with a rubber spatula, as necessary. Set aside.
For the flan: In a blender, combine the evaporated milk, condensed milk, cream cheese, eggs and vanilla. Blend until combined, about 1 minute.
Spoon the cake batter into the prepared Bundt pan and spread it evenly. Slowly pour the flan mixture over the cake batter. Cover the pan with foil and transfer it to a roasting pan. Pour in enough boiling water to come about 2 inches up the side of the Bundt pan and carefully transfer to the oven.
Bake until the surface of the cake is springy and a cake tester comes out clean, about 1 hour 30 minutes. Remove the Bundt pan from the oven and let the chocoflan cool in the Bundt pan at room temperature for 2 hours. Invert onto a serving platter and serve warm with berries in the middle and drizzled with more caramel sauce or refrigerate for 24 hours.