When the Turkish army retreated in haste after the Battle of Vienna in 1683, they left behind bags of coffee, or so the story goes. Perhaps it was the bountiful supply of coffee that led to Vienna’s famous café culture. Many a fine cake has come out of Vienna and this coffee cake is a prime example of how good a sponge cake can be. It is really simple to make but the results are stunning. I was reminded of this when I went for dinner at my neighbour’s house. Kath baked this cake for dessert and filled it with fresh raspberries. Use whatever fruits are in season.