Pirate ship and treasure island cake - Good Food Middle East

Ingredients

• 200g butter, cubed
• 300g dark plain chocolate, broken into pieces
• 200g plain flour
• ¾ tsp baking powder
• ¾ tsp bicarbonate of soda
• 250g light muscovado sugar, plus extra for decoration
• 3 eggs
• 200g soured cream
• 1½ tsp vanilla extract
• 150g sieved apricot jam, warmed
• 650g brown ready-to-roll icing
• 18 mini Toblerones
• 6 malt chocolate balls
• 6 chocolate caramels (we used Rolos)
• 8 mini chocolate fingers
• 100g white marzipan
• gold covered chocolate coins
• chocolate skull (optional)
• 250g royal icing made from packet royal icing sugar (use 250g sugar)
• blue food colouring
• 1 chocolate stick (we used Mikado) (optional)
• 30 x 20cm cake tin
• 30cm square cake board (preferably blue)
• 2 sheets black, white or blue paper
• 2 drinking straws
• 2 sandwich flags