Preheat oven to 400 degrees. Heat round cake pan in oven until very hot. Cook thinly sliced apple in microwave oven for 2 to 3 minutes. Set aside to cool.
Blend first four ingredients with mixer or blender until smooth. Mix sugar and cinnamon.
Put 1 1/2 Tablespoons butter in hot pan. Swirl to cover bottom of pan. Pour in batter Sprinkle sliced apples over top and push under batter. Sprinkle cinnamon sugar over top. Bake 20-25 minutes. Serve with Oregon Bounty Apple Cider Syrup.