Heat oven to 375°F. Bake biscuits as directed on bag.
Meanwhile, in small bowl, sprinkle brown sugar over sour cream; let stand 2 minutes. Beat in whipping cream on high speed until slightly thickened. Refrigerate until serving time.
Brush biscuits with butter; sprinkle with sugar. Cool 5 minutes. Split biscuits; fill and top with pie filling and sour cream mixture.