Combine flour, sugar, 1/4 cup of the cocoa, and baking powder in mixing bowl. In separate bowl, combine milk, applesauce and vanilla. Stir wet ingredients into dry ingredients. Spoon batter into greased 8 inch square bakingpan. Combine brown sugar, remaining 1/4 cup cocoa and water. Pour over batter. Bake at 350 40 mintues. Remove from oven; cool in pan. Cut into squares.