Afghan biscuits - Multix

Ingredients

• 250g butter, softened
• 1/3 cup caster sugar
• 1 cup desiccated coconut
• 1 teaspoon vanilla essence
• 1½ cups plain flour, sifted
• 2 heaped tablespoons cocoa powder, sifted
• 1 small pinch salt
• 1½ cups cornflakes
• 2 cups pure icing sugar, sifted
• 3 tablespoons cocoa powder, sifted
• 1 tablespoon butter, softened
• 3 tablespoons boiling water
• ½ teaspoons vanilla extract
• 16 walnut halves