One way is a peanut butter rice krispie treat called an O'Henry bar (I usually leave out the chocolate and butterscotch chips mostly because I don't keep them on hand)
http://www.cooks.com/recipe/ax6kt9wf...enry-bars.html
My mom also used to make a chocolate one when I was a kid. It had corn syrup in it and had to be refrigerated to stay solid. That's all I remember about that one.