Behind the Scences
- In the Muggle world, there are actual Cockroach Clusters candies, which are sold as novelties. The website Candy Addict rated them number seven of the "10 grossest candies." 
- Cockroach clusters may be a reference to the confection referred to in the Monty Python sketch, "Crunchy Frog". This may also be the origin of the Chocolate Frog sweet.