Preheat oven to 350 degrees
Combine brownie ingredients except Hershey bars until well mixed. Spread half of this batter into a 9-by-13-inch greased pan. Top with Hershey bars. Spoon the remaining batter on top of the candy bars.
Bake 40 to 60 minutes.
Mix together and microwave for 1 minute. Pour over hot brownies. (This make a lot of icing, so you can cut the recipe if you want.)