Bring butter, Cognac, water, syrup, coffee, and salt to a boil. Remove from heat. Add chocolate, cover saucepan, and let stand 5 minutes.
Once chocolate has softened, stir-cool until glaze thickens to the proper consistency, which is about like whipping cream but a little thicker. You may set the pan in cool water to hasten the cooling. If it gets too hard, r