In A Large Bowl, Combine Cereal And Peanuts; Set Aside. In A Microwave-Safe Bowl, Combine Brown Sugar And Corn Syrup. Microwave On High For 30-60 Seconds Or Until Sugar Is Dissolved, Stirring Several Times. Immediately Stir In Peanut Butter Until Smooth. Pour Over Cereal Mixture And Toss To Coat. Drop By Rounded Tablespoonfuls Onto Waxed Paper. Cool.