FOR A 9X13" GLASS BAKING DISH:
Cut Angel Food Cake in half horizontally; then cut each layer in half until you have 1 to 1 1/2 inch-wide sections.
Cut each section into one-inch cubes; set aside.
In a large mixing bowl, beat cream cheese and confectioners’ sugar until smooth.
Add 8-ounces of Cool Whip and beat again.
Stir in Angel Food Cake cubes.
Spread mixture evenly into an ungreased 9x13” glass baking dish.
Top with both cans of blackberry pie filling.
Spread additional Cool Whip on top of the blackberry pie filling leaving a two-to-three-inch border around the outside of the dish.
If desired, sprinkle some fresh blackberries and raspberries over top.
Cover and refrigerate at least two hours before cutting into squares.
TO MAKE IN A TRIFLE DISH:
Spread half of the angel food cake mixture into a trifle dish.
Spoon one can of blackberry pie filling over top.
Spread remaining angel food cake mixture on top of the blackberry pie filling.
Top with remaining can of blackberry pie filling.
Spoon remaining whipped topping in center of the trifle dish leaving at least a two-inch border around the outside edge.
Sprinkle with fresh blackberries and raspberries, if desired.
Refrigerate at least two hours, or until ready to serve.