Preheat the oven to 350℉. Spray a 9X9 inch baking pan with baking spray. Line the bottom with parchment paper and spray again.
In a medium bowl, mix the flour, cocoa powder, baking powder, baking soda, and salt. Set aside.
3 cups All-purpose flour, 1/4 cup Unsweetened cocoa powder, 2 tsp Baking powder, 1 tsp Baking soda, 1 tsp salt
In a large bowl, whisk together oil, sugar, vinegar, vanilla, sour cream, eggs, buttermilk, and red food coloring. Mix until combined.
1 cup Oil, 1 1/2 cups White granulated sugar, 1 tsp White vinegar, 1 tsp Pure vanilla extract, 3 Large eggs, 3/4 cup Sour cream, 1 tsp Red gel food coloring, 1 cup Buttermilk
Add in the dry ingredients and use a baking rubber spatula to mix until just combined.
Spread half of the red velvet cake batter into the pan. Spread it evenly. Use a spoon or cookie scoop to dollop the cheesecake batter evenly across the batter. Use an off set icing spatula to spread the batter evenly. Top with the remaining cake batter and spread evenly.
Bake for 30-35 minutes. Bake until a toothpick inserted comes out clean.
Let the cake sit for 10 minutes before transferring to a cooling rack. Cool completely before decorating.