- Line two or three large baking trays with baking paper or silicone.

- Break the chocolate into a microwaveable bowl and add the butter.

- Melt the mixture in 30-second bursts, stirring in between cooking. Stop when it's smooth and fully melted.

- Put the cornflakes into a larger mixing bowl, then add the melted chocolate.

- Use a large spoon to stir and coat all of the cornflakes.

- Take a glass (we used a shot glass) and create a ring of chocolate cornflakes around the rim. Make sure you use enough mixture so that it will stay together when it's set.

- Repeat until you've used all the mixture.

- Decorate with your sprinkles.

- Put in the fridge to set for a few hours or overnight. Enjoy!