Ingredients

  • Cheesecake Filling:
  • cooking spray
  • 4 (8 ounce) packages cream cheese, softened
  • 1 1/2 cups white sugar
  • 1/4 cup cornstarch
  • 1 tablespoon vanilla extract
  • 2 eggs
  • 2 egg whites
  • 1/2 cup heavy whipping cream
  • Red Velvet Cake:
  • 3/4 cup buttermilk
  • 3/4 teaspoon vanilla extract
  • 2 cups all-purpose flour
  • 2 tablespoons unsweetened cocoa powder
  • 1 teaspoon ground cinnamon
  • 3/4 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1 1/4 cups white sugar
  • 3/4 cup canola oil
  • 2 eggs
  • 1 teaspoon white vinegar
  • 1 teaspoon red food coloring
  • Buttercream Frosting:
  • 1 cup butter, at room temperature
  • 1 cup shortening
  • 1/4 cup marshmallow cream
  • 1 1/2 teaspoons vanilla extract
  • 5 cups confectioners' sugar, sifted

Method

  • Preheat oven to 350 degrees F (175 degrees C). Place a pan of hot water in the bottom of the oven.
  • Line two 9-inch springform pans with aluminum foil; grease with cooking spray.
  • Beat cream cheese in a bowl with an electric mixer until smooth, about 3 minutes. Add 1 1/2 cup white sugar and cornstarch; beat until smooth. Add 1 tablespoon vanilla extract. Beat in 2 eggs and 2 egg whites, 2 at a time, until batter is creamy. Add heavy cream; beat just until batter is free of lumps and fluffy.
  • Divide batter between the prepared pans.
  • Bake in the preheated oven until edges appear set, about 40 minutes. Turn off oven; leave cheesecakes inside for 1 to 2 hours. Chill until firm, at least 4 hours or overnight.
  • Preheat oven to 350 degrees F (175 degrees C). Grease and flour a 9-inch round cake pan.
  • Whisk buttermilk and 3/4 teaspoon vanilla extract together in a small bowl.
  • Whisk flour, cocoa powder, cinnamon, baking soda, and salt together in a separate bowl.
  • Beat 1 1/4 cup white sugar and oil with an electric mixer until creamy. Whisk in 2 eggs, one at a time. Add vinegar and red food coloring; beat well. Beat in flour mixture in 3 additions, alternating with buttermilk mixture, until batter is smooth. Pour batter into the prepared pan.
  • Bake in the preheated oven until a toothpick inserted into the center comes out clean, about 50 minutes. Cool for 10 to 15 minutes in the pan. Invert onto a wire rack. Cut horizontally into 2 even layers. Chill until firm, at least 4 hours to overnight.
  • Combine butter, shortening, and marshmallow cream in a large bowl; beat with an electric mixer on high speed until creamy. Add 1 1/2 teaspoon vanilla extract; beat until light and fluffy. Add confectioners' sugar 1 cup at a time, beating until frosting is smooth.
  • Place 1 cake layer on a serving plate. Spread a thin layer of frosting on top; stack 1 cheesecake layer over cake. Spread a thin layer of frosting over cheesecake; repeat layers. Spread frosting over top and sides of cake.