Entered for safe-keeping. From “Super Food Ideas”, September 2008 (#1 Australian food magazine). Leftover cake and sauce can be saved for up to 3 days: store cake in airtight container at room temperature. Refrigerate sauce in an airtight container. Whiskey is an optional ingredient. I have tried to give U.S. equivalents of measurements. Double cream is the name in Britain for a very rich cream — containing 48% butterfat. Whipping cream in this country, by contrast, contains between 30% and 40% butterfat. Single cream in Britain is comparable to American half and half (and may also be called pouring cream), with between 10% and 12% fat. I am guessing that spreadable mascarpone will yield a similar rich creamy taste to finish off this dessert.