When I worked at the IU bookstore in the student union, there was a bakery inside called "Sugar and Spice." They had the most delicious treat...a chewie, a peanut buttery crunchy snack. Kind of like a rice krispie treat but with peanut butter and cereal...to die for. I will have to try this recipe to see if it matches up.
Peanut Butter Crunchy
Update: 3/25/15
I went down to the IU campus a couple of days ago and had a chewie. They tasted just the same as they did 25 years ago! I made this recipe and it is almost the same. Heavenly.