Due to popular demand here is the recipe for Mary Berry's Chocolate Tray Bake (from the Mary Berry Ultimate Cake Book). The icing can be difficult to make just because of the amount of icing sugar,. (cake making mary berry)
This classic Bakewell tart is topped with feathered icing to give an impressive finish. For this recipe you will need a fluted flan tin, baking beans, piping bag fitted with small plain nozzle and a few cocktail sticks.