Preheat the oven to 200 C / Gas 6. Lightly grease a baking tray.
Mix the butter, sugar, egg, flour and dried fruit in a bowl. On a lightly floured surface, knead the dough until it comes together. Divide the mixture into 20 to 24 balls and place on the prepared baking tray.
Bake in the preheated oven until golden, about 10 minutes.