saucepan, combine butter, cocoa and 1 cup water.
to a boil, stir constantly. Remove from heat.
large bowl, sift together flour, sugar, soda, salt and
in eggs, buttermilk and vanilla. Add cocoa mixture and mix
till well blended.
into greased 15½" x 10½" x 1” baking pan.
at 375° for 20 minutes.
Immediately pour frosting over brownies, spread evenly, cool
and cut into bars.