You can experiment with using different types of cereal in these bars, or white chocolate instead of dark.
We call these "Special K" bars, for the obvious reason, at our house. My recipe calls for 1 tsp of vanilla to be added with the peanut butter. If your bars are turning out hard, you are over cooking the sugar and syrup. Once that mixture boils, I remove the pan from the heat and add the peanut butter and vanilla. I also use butterscotch chips instead of peanutbutter ones. - 03 Jul 2003 (Review from Allrecipes USA and Canada)
I guess there is many versions of this recipe. The one I make is similar. I took it to work and my co workers all in the food industry went crazy over these! They are very rich but delish. It is: 1 cup sugar, 2/3 cup margarine, 1 cup light Karo corn syrup, 1 1/2 cup peanut butter, 1 tsp. vanilla, 8-9 cups cornflakes, 12 oz. peanut butter chips and 12 oz. chocolate chips. Using a large pot, mix sugar, marg, and syrup over med. heat just until it comes to a boil. Remove from heat and add peanut butter, van, and corn flakes. Mix well. Press into 13x9 greased pan. Cool. Melt peanut butter and choc chips together in microwave until melted and spread on top of corn flakes. Keep in frigerator. So fast and easy! - 26 Oct 2003 (Review from Allrecipes USA and Canada)
Great, easy dessert. Very quick to make. I left out the chocolate chips and peanut butter chips. They're great on their own. One important thing: Cut these in the pan while they're still warm!!!! You'll never get the knife through them when they cool off. They're still soft enough to chew, but very hard to cut! I'm glad I cut them beforehand!!!!! - 29 May 2002 (Review from Allrecipes USA and Canada)