Combine all brownie ingredients in a large bowl and mix well. Spread into a greased 13x 9-inch baking dish. Bake at 350 degrees for 25 minutes. Allow cooling before frosting. To make frosting, melt butter in a saucepan and add buttermilk and cocoa, slowly add confectioners’ sugar and continue stirring until smooth. Frost cooled brownies and sprinkle with nuts if desired.

The Skinny: Use your favorite sugar substitute for the sugar in the brownies and frosting. Use low fat milk or light Half & Half instead of buttermilk in the frosting.