1.Preheat the oven to 180 Degrees Celsius 2.Pour self-raising flour, caster sugar, milk, lightly beaten egg, melted butter, chocolate chips and coconut into a large bowl. Stir until smooth. 3.Spoon mixture into muffin holes until 3/4 full, bake for 15- 20 minutes until the surface is hard 4.Melt the block of Cadbury chocolate, spread onto muffins 5.Lightly sprinkle with coconut and sprinkles 6.Bake for another five minutes