Gravity-defying sweetie cake - Good Food Middle East

Ingredients

• 150ml vegetable oil, plus extra for greasing
• 200g plain flour
• 8 tbsp cocoa powder
• 2 tsp baking powder
• 1 tsp bicarbonate of soda
• 280g light brown soft sugar
• 200ml buttermilk
• 100ml strong coffee or espresso
• 2 tsp vanilla extract
• 2 large eggs
• 2½ x 114g packs milk chocolate fingers
• 8 tubes of Smarties, or other sweets
• 100g milk chocolate, chopped into small pieces, plus 50g/2oz for decorating
• 200g slightly salted butter, softened
• 400g icing sugar, seived
• 4 tbsp cocoa powder
• 2 tbsp milk
• 1 bendy straw
• 2 wooden skewers
• 1 paper bag or sweet packet (see tip)
• sticky tape