Meanwhile, in 1-quart saucepan, heat 1/2 cup whipping cream and the caramels over medium heat, stirring frequently, until caramels are melted. Stir small amount of the hot mixture into beaten egg, then stir egg back into mixture in saucepan. Cook over medium heat 2 to 3 minutes, stirring constantly, until thickened. Stir in pecans. Spread over brownie. Refrigerate uncovered at least 3 hours until chilled.