Butter bottom and sides of a cookie sheet. Melt Nestle semi-sweet chocolate chips in double boiler. Measure 1/2 cups peanut butter and place in large bowl. Cook sugar and light Karo syrup; bring to a boil. Pour sugar and Karo syrup mixture in with peanut butter and mix. Quickly add 6 cups Honey & Nut Cheerios. Spread in buttered cookie sheet. Pour melted chocolate over top and spread with knife. Refrigerate until cold and cut. Store in refrigerator.