Magic Chocolate Flan Cake

Name: Magic Chocolate Flan Cake
Ingredients: 1/2 cup caramel sauce or topping; 1/2 cup plus 2 tablespoons (3 1/8 ounces/89 grams) all-purpose flour; 1/3 cup (1 ounces/28 grams) cocoa; 1/2 teaspoon baking soda; 1/8 teaspoon salt; 4 ounces (113 grams) bittersweet chocolate , chopped; 6 tablespoons unsalted butter; 1/2 cup buttermilk; 1/2 cup (3 1/2 ounces/99 grams) sugar; 2 large eggs; 1 teaspoon vanilla extract; 2 (14 ounces/397 grams) cans sweetened condensed milk; 2 1/2 cups whole milk; 6 ounces (170 grams) cream cheese; 6 large eggs plus 4 large yolks