Ingredients: (makes 17)  
110g/4oz dark chocolate (or milk chocolate for sweeter taste)
25g/1oz unsalted butter
50g/2oz caster sugar
1 egg
1 tbsp vanilla essence
100g/3½ oz plain flour
¼ tsp baking powder
3-4 tbsp icing sugar

Method:
1. Put the chocolate and butter in a bowl over a pan of simmering water and leave to melt, stirring occasionally.
2. Beat the egg together with the caster sugar for approx 2 mins until thick and fluffy. Stir in vanilla essence and the melted chocolate.
3. Sift in the flour together with the baking powder and stir until smooth.
4. Refrigerate for a few hours until the mixture is firm enough to shape into balls.
5. Shape the mixture into small bowls, about 1 inch in diameter.
6. Sift the icing sugar into a shallow bowl and roll the balls in it until they are completely coated.
7. Preheat the oven to 190°C/fan 170°C, arrange the balls on a baking tray lined with a baking paper and bake for approx 10 mins.