Frosted Rice Krispie Treats

2 cups Karo Syrup (Light)
2 cups sugar
2 cups peanut butter
12 cups Rice Krispies
1 pkg. Chocolate chips
½ -1 pkg. Butterscotch chips

Melt syrup, sugar and Peanut butter in saucepan. Pour over rice krispies and mix until completely coated. Press into 11X17 pan. Melt chocolate chips and butterscotch chips and spread over Rice Krispie treats. Let cool until set. Serve.