Meanwhile, in 1-quart saucepan, heat caramels and evaporated milk over medium heat, stirring frequently, until caramels are melted. Stir in pecans. Pour caramel mixture over warm cake in pan. Sprinkle with chocolate chips. Spread with remaining batter. Bake 25 minutes (29 minutes for dark or nonstick pan) or until cake springs back when lightly touched. Run knife around sides of pan to loosen cake. Cool at least 30 minutes. Serve with ice cream, drizzle with topping and sprinkle with pecans. Store loosely covered at room temperature.