Preheat your oven to 350°F (175°C). In a large mixing bowl, cream together the softened cream cheese, granulated sugar, and all-purpose flour until smooth. Gradually mix in the vanilla extract, ground cinnamon, and heavy whipping cream. Add eggs one at a time, stirring gently after each addition. Pour the mixture into a prepared springform pan and bake for 10 minutes, then reduce the temperature to 200°F (93°C) for 30-35 minutes until the center is slightly jiggly. Once baked, cool in the oven and refrigerate overnight.

The next day, preheat your oven again to 350°F (175°C). In a large bowl, cream the softened butter and brown sugar together until light and fluffy. Beat in the egg and vegetable oil until well combined. In another bowl, combine the all-purpose flour, baking powder, and ground spices. Gradually add the dry ingredients to the butter mixture, alternating with milk, until a smooth batter forms. Pour the batter into a greased cake pan and bake for 15-17 minutes or until a toothpick inserted comes out clean. Let it cool completely and refrigerate overnight.

In a large mixing bowl, beat the softened unsalted butter until fluffy, about 2-3 minutes. Gradually add the powdered sugar, mixing on low speed to prevent a sugar cloud. Once combined, increase to medium speed and add in the vanilla extract and heavy whipping cream until the frosting reaches your desired whipped consistency. Set aside or refrigerate if needed.

To bring your Thanksgiving Piecaken to life, start by placing the cheesecake layer upside down on a cake stand. Spread a layer of buttercream frosting evenly over the cheesecake. Next, take the cooled spice cake layer and place it on top, adding more frosting on this layer as well. Finally, place the pumpkin pie right side up on top of the spice cake and cover the entire assembly with an outer layer of frosting. Chill the assembled Piecaken for at least 30 minutes to set the frosting, then get ready to impress!

After chilling, take a moment to decorate your Thanksgiving Piecaken with additional frosting swirls or seasonal toppings, if desired. To serve, slice through the delightful layers with a sharp knife, revealing the stunning combination of pumpkin pie, cinnamon cheesecake, and spice cake. Don’t forget to serve with a side of whipped cream or ice cream.