Cut the cooled angel food cake into approximately 1-inch cubes.
Arrange half of the cake cubes evenly at the bottom of a 9×9 cake pan, whether it's made of metal or glass.
Evenly distribute about two-thirds of the cherry pie filling over the layer of cake.
Place the remaining half of the cake cubes over the cherry pie filling.
Combine the pudding mix, milk, and sour cream in a medium-sized bowl, stirring until the mixture achieves a smooth consistency, usually around 2 minutes. Spread this mixture evenly over the cake.
Spread the Cool Whip over the pudding layer. Then, distribute the remaining cherry pie filling on top.
Refrigerate the cake for 4 to 5 hours until it's thoroughly chilled.