1 cup light corn syrup
1 cup sugar
3/4 cup reduced fat peanut butter
4 cups Grape Nuts Cereal
Microwave corn syrup, sugar and peanut butter in large microwavable bowl on high for 2 minutes, or just until mixture boils, stirring every minute. Add cereal; mix well.
Line 13x9-inch pan with foil, with ends of foil extending over sides of pan. Spray lightly with cooking spray. Press cereal mixture firmly into prepared pan. Cool. Lift cereal mixture from pan, using foil handles. Cut into 30 bars. Wrap bars individually with plastic wrap. Store in tightly covered container at room temperature.