Gold sparkle cupcakes

Ingredients

• Cupcakes
• 125 gram butter, at room temperature
• 3/4 cup caster sugar
• 2 eggs, at room temperature
• 1 teaspoon vanilla essence
• 1 1/4 cup self-raising flour
• 1/4 cup cocoa powder, sifted
• 2/3 cup milk
• Buttercream
• 100 gram butter, at room temperature
• 1 cup icing sugar
• 2 tablespoon cocoa powder, sifted
• 1 tablespoon milk
• To decorate
• 180 gram white chocolate melts, melted
• edible gold glitter, to dust