Genoise.
I still have the picture,.
For the butter cream I use about 1/4 cup softish butter, and I then add several heaped table spoons of icing sugar, I don't know what you call it in U S, but the very fine stuff like flour, I beat that to a nice soft mix, and I add a product from UK called Camp coffee, in a bottle, it make really crappy coffee but is great for things like butter cream etc, but yes if you could make up a very strong mix of instant and a dash of hot water that would do it....
qahtan