Prepare cake mix as directed on package. Stir in apples. Pour batter into greased ... is set like custard. Sprinkle with cinnamon, if desired. Refrigerate and keep refrigerated.
Preheat oven to 350 degrees. ... directions; stir in apples. Pour batter into a ... is set like custard. Sprinkle with cinnamon. Cool completely. Keep refrigerated.