Combine water, butter, and cocoa. ... again. Add sour cream and soda. Pour into 12x17 inch cookie sheet. Batter will be thin. ... Spread on warm cake. My pan measurements are ... the sugar and flour.
Boil water, butter and cocoa ... combine flour, sour cream, soda, salt and sugar. ... Pour into greased sheet pan. Bake at 350 degrees ... thick. Pour over cake. Serves 8 to 10.