Preheat oven to 350~. Mix together miracle whip, eggs and water until well beaten. Add brownie mix, mixing until moistened. Coarsely chop two chocolate bars; stir into brownie mix along with chopped nuts. Pour into a greased 13 x 9 baking dish. Bake 30-35 minutes or until edges pull away from sides. Immediately top with the remaining chopped chocolate bar. Let stand 5 minutes or until chocolate is melted; spread evenly over brownies. Garnish with chopped nuts if desired.
