Mocha Mocha

Recipe for Mocha Cake Filling:

Cream 2 tablespoons of butter with 1 1/2 cups confectioners sugar
1/2 teas vanilla
3 teas cocoa and sufficient strong coffee to make the mixture of spreading consistency. Beat until smooth and glossy.

Found in "The Every-Day Cook Book" by Mrs. E. Neil. Published by Donohue and Co., no date.