This is a BBC recipe, and really easy to make with kids.
Heat your oven to 190c
Beat the butter and sugar together until they are smooth, then stir in the flour to make a smooth paste.
Flour a work surface and roll out the paste until it is 1cm/1/2 an inch thick.
Cut into rounds or fingers or use your favourite cookie cutters and place on a baking tray. Sprinkle with caster sugar and chill in the fridge for 20 minutes.
Bake in the oven for 15-20 minutes, or until pale golden-brown
Cool on a rack, while you melt the chocolate and pour it into a bowl.
Dip the biscuits into the melted chocolate and set aside to cool. Add sprinkles if you like!