Step 1: Prepare the Red Velvet Cake Base
Preheat your oven to 325°F (163°C). Grease and flour a 9-inch springform pan, or line the bottom with parchment paper to make removal easier.
In a medium bowl, sift together the flour, sugar, cocoa powder, baking soda, and salt. Set aside.
In a large bowl, whisk together the buttermilk, vegetable oil, egg, red food coloring, vinegar, and vanilla extract until well combined.
Gradually add the dry ingredients to the wet ingredients and mix until just combined. Be careful not to overmix the batter to avoid a dense cake.
Pour the red velvet cake batter into the prepared springform pan, spreading it evenly with a spatula. Set aside while you prepare the cheesecake layer.
Step 2: Prepare the Cheesecake Layer
In a large bowl, beat the softened cream cheese and sugar together with a hand mixer or stand mixer until smooth and creamy.
Add the eggs one at a time, mixing well after each addition.
Stir in the vanilla extract, sour cream, and flour until smooth and well combined.
Pour the cheesecake mixture on top of the red velvet cake layer in the springform pan. Use a spatula to smooth out the top of the cheesecake layer.
Step 3: Bake the Red Velvet Cheesecake
Place the springform pan on a baking sheet to catch any potential drips. Bake in the preheated oven for 60-70 minutes, or until the cheesecake layer is set and a toothpick inserted into the center comes out clean. The cheesecake will be firm but still have a slight jiggle in the center.
Once baked, turn off the oven and leave the cheesecake in the oven with the door slightly ajar for 1 hour. This helps prevent cracks from forming.
After 1 hour, remove the cheesecake from the oven and allow it to cool completely on a wire rack.
Once cooled, refrigerate the cheesecake for at least 4 hours or overnight to allow it to firm up and set properly.
Step 4: Serve and Enjoy
After the cheesecake has chilled, carefully run a knife around the edge of the springform pan to loosen the sides. Remove the sides of the pan.
Transfer the cheesecake to a serving plate and slice it into wedges. You can optionally top it with whipped cream or red velvet crumbs for an extra touch of decoration.
Serve chilled and enjoy the perfect combination of red velvet cake and cheesecake!