Heat oven to 375°F. Bake biscuits as directed on bag; place on cooling rack. Brush tops with melted butter; sprinkle with toffee bits, pressing down slightly.
Place pudding in small bowl; gently fold in whipped topping. Carefully split warm biscuits on serving plates; fill with pudding mixture and banana slices. Drizzle with topping; sprinkle with additional toffee bits if desired.