If you'd like to cover this Weetabix slice with chocolate instead of icing, this is what to do. You can use good quality baking chocolate, or a normal bar of milk chocolate such as Nestle or Cadbury's. To cover the cake you will need about 100 grams or 3.5 ounces of chocolate. Break the chocolate into pieces and place it in a glass bowl. Microwave in 30-second blasts on full power, stirring after each 30 seconds until the chocolate is smooth and melted. My 900-watt microwave takes 1 minute. Alternatively, place the pieces of chocolate into a glass bowl over a pan of simmering water and stir until the chocolate has melted. Be very careful not to get any water into the chocolate or it may turn into hard lumps. Using a flat-bladed knife, spread the melted chocolate evenly over the cake and leave it to cool and set.