Meanwhile, in 1-quart saucepan, heat caramels, 2 tablespoons butter and the condensed milk over medium-low heat 5 to 10 minutes, stirring frequently, until caramels are melted. Remove from heat. Carefully pour filling over partially baked crust; spread evenly. Sprinkle with peanuts. Bake 15 to 18 minutes or until filling is bubbly. Cool completely in pan on cooling rack, about 1 hour. Cut into 6 rows by 4 rows.