Triple-chocolate crackle crunch cake

Ingredients

• Chocolate Cake
• 1/2 cup (50g) Dutch-processed cocoa
• 1/2 cup (125ml) boiling water
• 185 grams butter, softened
• 1 teaspoon vanilla extract
• 1 1/2 cups (330g) caster sugar
• 3 eggs
• 150 grams dark chocolate, melted, cooled
• 1 1/2 cups (225g) self-raising flour
• 1/2 cup (75g) plain flour
• 3/4 cup (180ml) buttermilk
• 1/4 cup (25g) Milo
• Whipped Ganache
• 2 cups (500ml) pouring cream
• 600 grams milk chocolate, chopped finely
• Crackle Crunch
• 200 grams dark chocolate, chopped coarsely
• 100 grams butter, chopped
• 1/4 cup (40g) icing sugar
• 3 cups (100g) Rice Bubbles
• 3/4 cup (60g) desiccated coconut