salted caramel chocolate cheesecake cake

Ingredients
For the cheesecake:
2 pkg (8oz each) cream cheese, softened
2/3 cup granulated sugar
pinch of salt
2 large eggs
1/3 cup sour cream
1/3 cup heavy cream
1 tsp vanilla
For the cake:
1 recipe chocolate layer cake (9inch layers)- homemade or cake mix is fine
For the frosting:
1 cup unsalted butter, softened
1/2 cup caramel sauce (homemade caramel sauce or jarred is fine)
4 cup powdered sugar
2 Tbsp milk
1/2 tsp kosher salt
For the ganache:
4 oz dark chocolate
1/3 cup heavy cream
2 Tbsp caramel sauce
pinch of kosher salt
Instructions