Heat oven to 375°F. Spray 1-quart casserole with cooking spray.
In small bowl, mix topping and whipping cream until smooth; set aside. In another small bowl, place dates; cover with boiling water and vanilla. Set aside.
Place biscuits on microwavable plate. Microwave uncovered on Medium (50%) 30 to 45 seconds, turning over halfway through microwave time. (Biscuits should still be cold for easier handling.) Cut each biscuit into 4 pieces; set aside.
In medium bowl, mix brown sugar and butter until well blended. Add biscuit pieces; toss to coat. Gently stir in date mixture. Pour biscuit mixture into casserole; spread evenly.
Bake 20 to 25 minutes or until top is golden brown--except 5 minutes before end of bake time, drizzle evenly with topping mixture (mixture will bubble during baking). Cool 10 minutes. Serve warm with whipped cream and pecans.