In a bowl, sift together the flour, cornstarch and salt and set it aside.
95 g all-purpose flour, 1 tablespoon cornstarch, ½ teaspoon salt
Melt the chocolate. Once melted, pour it into a large bowl and add the cocoa powder and stir it together with a hand whisk or electric mixer.
75 g dark chocolate, 15 g cocoa powder
Then add the granulated sugar, vegetable oil, white vinegar, vanilla extract and red food color and whisk it together.
250 g granulated sugar, 110 g vegetable oil, 2 teaspoon red paste food coloring, 1 teaspoon white vinegar, 1 teaspoon vanilla extract
Then add the eggs, and mix them for 1-2 minutes, on high speed using an electric mixer.
3 large eggs
Add the dry ingredients to the batter, and on low speed, mix it together until combined.
Pour most of the brownie mixture into the prepared pan, leaving about 4-5 teaspoons in the bowl for topping the cheesecake filling with. Smooth out the brownie batter. Add dollops of the cheesecake filling on top of the brownie batter and smooth it out a bit. Then dollop the remaining brownie batter over the cheesecake batter and with a toothpick or butter knife, swirl the cheesecake and brownie batter together.
Bake for about 50-55 minutes. Once baked, let it cool down for 30 minutes on a wire rack at room temperature, then refrigerate for 1 hour or more and it’s ready to be served.