I have made German Chocolate cake for over 20 years and the icing does not use sweet and condensed milk, it uses evaporated milk. Perhaps you mixed the 2 up in your mind? I have to be careful when I see baking soda and baking powder as I will tend to mix them up. I would use the coconut milk , thicken it with arrowroot or flour to thicken it or make a vanilla custard using the coconut milk and put coconut in it. Sound like a wonderful filling.
6/6/14 at 6:10am