Preheat oven to 350 degrees. Grease a 9-inch round cake pan. Cut a piece of parchment paper in a circle so that it sits in the bottom of the pan; grease the parchment paper.
Melt 4 tablespoons of butter and pour into the bottom of the cake pan.
Pour the apple pie filling into the bottom off the cake pan; spread it in an even layer. Set pan to the side
In a large bowl, whisk together the flour, baking powder, salt and cinnamon.
In a separate bowl, whisk together the eggs, sugar, milk, vanilla, apple butter, and 6 tablespoons melted butter.
Add the wet ingredients to the dry ingredients and mix until smooth. Pour batter into cake pan.
Bake for 55-65 minutes or until toothpick inserted into the center of the cake comes out clean. Remove cake from oven and let cool for 20-30 minutes.
Run a knife around the edge of the pan to loosen the cake. Place a large plate over the cake and carefully invert the cake onto the plate. Remove the cake pan and gently peel back the parchment paper.
Allow the cake to cool slightly before cutting. Serve with vanilla ice cream and/or whipped cream.