Heat the oven to 190C/375F/Gas 5.

Beat the butter and the sugar together until smooth.

Stir in the flour to get a smooth dough. Turn onto a work surface and gently roll out until the dough is 1cm to ½in thick.

Cut into hearts, fingers or any shape you like and place onto a baking tray. Sprinkle with caster sugar and chill in the fridge for 20 minutes.

Bake in the oven for 10-15 minutes, or until pale golden-brown. Set aside to cool on a wire rack.