Jaffa cakes are no where near as tricky to make at home as you might think. The only fiddly bit is making the chocolate look perfect – but they're still great if you just spoon it over. For this recipe you will need a 5cm/2in round biscuit cutter, a 4.5cm/1¾in round biscuit cutter, 30x20cm/12x8in baking tray and a 12-hole shallow bun tin.
Mary Berry's recipe for Chocolate and Irish Cream Roulade from Mary Berry Cooks the Perfect. It's one of Mary's all-time favourite party desserts as you can make it ahead and it also freezes beautifully (un-iced). All you need to do is simply thaw the roulade in the fridge overnight and drizzle over the icing just before serving.