Carnation Billionaire's Shortbread

Ingredients

• For the Base:
• 250g shortbread biscuits, crushed
• 4 tbsp cocoa powder
• 55g unsalted butter, melted
• For the Caramel:
• 150g dark brown soft sugar
• 95g unsalted butter
• 397g Carnation Sweetened Condensed Milk
• For the Topping:
• 200g white chocolate, melted
• 55g dark chocolate, melted
• Edible glitter
• Equipment:
• 20cm square tin, lined with baking parchment