Unicorn cake - Good Food Middle East

Ingredients

• 300g white fondant
• edible gold lustre dust
• multicoloured sprinkles, to decorate (optional)
• 10g black fondant
• 325g unsalted butter, softened, plus extra for the tin
• 325g caster sugar
• 1 tsp vanilla bean paste
• 6 eggs
• 325g self-raising flour
• 2 tsp baking powder
• 4 tbsp milk
• 450g unsalted butter, softened
• 900g icing sugar
• 200g salted caramel (optional)
• purple, pink and blue gel food colourings