Put a pot on a medium low heat and melt the butter with the condensed milk.
2. Step
Stir in the cocoa powder and continue to stir for 10-15 minutes until the mixture begins to pull away from the edge of the pot.
3. Step
It’s done when you run the spoon through the centre of the mixture and it takes a few seconds to combine again.
4. Step
Spread the mixture onto a buttered plate and refrigerate for 2 hours.
5. Step
When set, roll the mixture into small balls and coat them in the chocolate sprinkles (you may need to apply a small amount of butter to your hands to help them from sticking).