1. Cut the cake into bite-size pieces.
2. Beat the pudding mix with the milk in a medium bowl. Fold in the sour cream.
3. Combine all the berries in a bowl; toss gently. Reserve 1/2 cup mixed berries for topping.
4. Alternate layers of the cake, pudding mixture, berries and whipped cream in a clear glass bowl, ending with whipped cream. Cover the bowl loosely with plastic wrap and refrigerate until serving time. Top with the reserved berries just before serving.
Tip: Cutting Angel Food Cake
A long, sharp serrated knife is the best utensil for cutting the angel food cake. Slice the airy cake gently using a light sawing motion.