Spray a 9" x 13" baking dish with nonstick cooking spray.
First, cut up cream cheese into cubes.
Put cut cream cheese into a large microwave safe bowl.
Top with powdered sugar.
Microwave in 30 second intervals (stirring after each time) until cream cheese mixture is smooth.
Slowly stir in milk.
Then very gently stir in fresh blackberries.
Cut blueberry biscuits into eighths.
Then gently stir in cut biscuits to cream cheese mixture.
Spread mixture into baking dish.
Bake for about 32-36 minutes.
Biscuits should be golden brown and not "doughy".
Optional topping is whipped cream or a dusting of powdered sugar. Can't find the blueberry biscuits? Use Pillsbury™ Grands!™ refrigerated original biscuits. Cut them into eighths and roll each piece into sugar (or cinnamon/sugar mixture) and proceed with the rest of the recipe.