Heat oven to 425. Spray a lg baking sheet w/ cooking spray.
In lg bowl, stir together Bisquick mix, chocolate chips, 1/3 cup whipping cream, 3 tbsp sugar, egg and vanilla until soft dough forms.
Pat dough into an 8"-circle on baking sheet. Brush w/ remaining whipping cream. Sprinkle w/ remaining sugar. Cut into 8 wedges, but don't separate. Bake 12 min, or until golden brown. Separate and serve warm.