Put sugar, syrup and peanut butter in a large heavy pan. Heat very hot, almost to boil, and stir constantly. Take off stove, mix in scrunched corn flakes. Mix well. Press lightly into oiled pan (9x13). Sprinkle chocolate chips evenly over the top. They will melt after a while but, to speed up the process, put in the oven for a few minutes. Score the bars while still hot, they are hard to cut when cool. These freeze well.