SUPER Cocoa Krispie Treats

I developed this recipe because I love Cocoa Krispies, I like the original Rice Krispies Treats and wanted a really yummy best-of-both treat! I use a little more butter than the original recipe. And I use 1 cup less of the cereal for a chewier, gooier* treat. Also, it is imperative that you use fresh marshmallows. I thought I could use up an old hardened bag my m-i-l gave me and they simply would not melt and mix. *Although not so gooey that they are sticky-messy.