Prepare the muffin tin: line a 12 cup muffin tin with patty pan liners.
Combine dry ingredients: add rice bubbles, sifted icing sugar, sifted cocoa powder, ½ of the chocolate sprinkles and coconut to mixing bowl. Stir to combine.
Combine sprinkles: add the various sprinkles to a small mixing bowl and stir to combine. Set aside.
Melt copha: place copha into heatproof jug. Microwave for 5 minutes on high to melt. Use a tea towel around the handle of the jug when removing from the oven.
Combine: pour the melted copha into the dry ingredients and use a wooden spoon to stir and combine.
Sprinkle mixture: add half of the combined sprinkles to the wet crackle mixture.
Combine: pour the melted copha into the dry ingredients and use a wooden spoon to stir and combine.
Transfer: use a combination of a desert spoon and soup spoon to portion the wet mixture into the patty pan liners. Repeat to fill all 12.
Decorate: the top of each white chocolate crackle with sprinkles, then place the muffin tin into the fridge to set. Chill for a minimum of 1 hour.