Preheat oven to 350°F. Line 8x8-inch baking pan with aluminum foil and spray with no-stick cooking spray.
In medium microwave-bowl, combine Blackberry Crumble Bar Mix packet 1 and melted butter. Mix with a fork until crumbly. Reserve 1 cup. Press remainder into bottom of prepared pan.
Place cream cheese in same bowl, microwave on HIGH 45 seconds. With large wooden spoon, mix vigorously until smooth. Gently stir in Blackberry Crumble Bar Mix packet 2 and egg; then mix vigorously until well combined .
Spread over crust. Top with reserve crumble and press gently into cream cheese mixture. Bake 30 minutes. Cool completely. Keep refrigerated.