Found this recipe in 'The Perfect Cake' by Susan G. Purdy. I used it on RhondaJ's BEST EVER Banana Cake with Cream Cheese Frosting (#67256), instead of the cream cheese frosting. It pairs wonderfully with the banana cake. Very rich, and it offsets the sweetness of the cake. This glaze sets with a fine gloss and holds up well in hot weather. The consistency is rather fudge-like - creamy and smooth. You must whisk in enough water in the beginning (all at once) to prevent chocolate from seizing. Cakes coated with this glaze can be frozen. This recipe makes enough to glaze one 9-inch 2 or 3 layer cake.