method Preheat the oven to 160ºC (315ºF). Line a baking tray with baking paper. Put the butter and sugar in the bowl of an electric mixer fitted with a paddle attachment. Beat fo

method Preheat the oven to 150ºC (300ºF). Line a baking tray with baking paper. Sift the flour and baking powder into a bowl. Put the sugar, eggs, yolk, vanilla seeds and lemon z

Method Preheat the oven to 180°C (350°F/Gas 4). Line a 20 cm (8 inch) square slice tin, about 4 cm (1½ inch) deep, with baking paper. Remove the butter from the refrigerator 20