This is a recipe for a moist, fluffy, and crack-resistant chocolate soufflé cheesecake that can be made with just four ingredients (chocolate, cream cheese, eggs, and granulated sugar). Prepare a heatproof bowl with vegetable oil and cake flour, then mix in cream cheese softened in the microwave and egg yolks, and add chocolate melted in the microwave to make the batter. Whip the egg whites with granulated sugar using a hand mixer, and gently fold this into the chocolate batter in several batches. Pour the batter into the prepared bowl, remove air bubbles with a bamboo skewer, and bake in a water bath in a preheated oven at 150°C for 60 minutes. The cake will be slightly steamy when it comes out of the oven, but if you chill it overnight, it will become even more moist and rich, and you can enjoy a delicious dessert with a fluffy, melt-in-your-mouth texture and a rich chocolate aroma.