Bring to a boil the 125g butter, 1/2 cup copha, water and 1/4 cup cocoa. Remove from heat and add flour, sugar, 1/2 cup (125ml) milk and vinegar. Mix well, then add eggs, bicarb soda and 1 teaspoon vanilla.
Mix well until lumps are gone. Pour into greased 20x30cm pan. Bake at 200C for 20 minutes or until toothpick comes out clean.
To make the icing: combine in saucepan 6 tablespoon butter, 4 tablespoons milk and cocoa. Bring to rolling boil. Remove from heat and add 3 cups icing sugar and 1 teaspoon vanilla. Beat until smooth. Spread on cooled cake.
Have an idea for a different icing. It may sound weird but believe me it´s delicious. Just melt 200 g of dark chocolate and mix it with the same amount of sour cream. That icing is soft and very tasty! - 24 May 2012