In a saucepan put the butter, wine, sugar, cocoa, water and vanilla. Put it on the stove and stir until melted sugar. From this mixture was removed 1/3 cup greasing cake top. When the mixture is cool, add the beaten eggs and flour with baking powder. Mix with mixer. Pour into greased and floured pan. Bake at 200 ° C until ready. When cool cut into pieces and the top is coated with the separated mixture. Can be decked with ground walnuts or coconut.