Chocolate Orange Cheesecake Layer Cake
1 cup softened butter 
3-4 tbsp milk 
For the Chocolate Ganache Glaze:
2 cups chocolate chips 
1/2 cup whipping cream
Instructions
To Prepare the Chocolate Cake:
In a large bowl, combine all cake ingredients (except the orange liqueur) and beat with an electric mixer for 2 minutes.
Pour the batter into 2 greased and floured 10-inch cake pans.
Bake at 325°F (165°C) for 25-30 minutes, or until a toothpick inserted into the center comes out clean.
Cool the cakes completely on wire racks.
Poke holes into the cake layers with a fork and pour 1 oz of orange liqueur over each layer (optional). Let it soak in.To Prepare the Orange Cheesecake:
In a mixing bowl, cream together the cream cheese and sugar until smooth. Add the eggs, one at a time, beating well after each addition. Stir in the vanilla extract, orange zest, and whipping cream. Pour the cheesecake mixture into a parchment-lined 10-inch springform pan. Bake at 325°F (165°C) for 50 minutes to an hour, or until the surface no longer looks glossy.
Immediately run a sharp knife around the edge of the pan to release the cheesecake and cool completely in the pan.To Assemble the Cake:
Once the cheesecake is fully cooled, place one chocolate cake layer on top of the cheesecake in the springform pan. Invert the entire cake onto a serving plate, remove the springform pan and parchment paper, and place the second chocolate cake layer on top. Frost the cake with a thin layer of chocolate buttercream frosting and refrigerate for 1-2 hours.