Combine the butter, cream, sugar, corn syrup, cocoa, and salt in a small saucepan over medium heat and bring to a simmer.
Simmer on low and keep stirring. Do this for 3-5 mins.
Once melted, remove heat and stir in the chocolates.
Let cool before chilling it.
Store in a mason jar in the fridge!
To reheat gently microwave.