In a saucepan, combine 400g of caramel candies and 200g of butter. Place it over low heat, stirring continuously until the candies dissolve completely.
Once the mixture is off the heat, add half a pack of corn puffs and mix thoroughly.
Transfer the warm mixture onto a sheet of plastic wrap, shaping it into a roll.
Let it cool, then refrigerate.
Before serving, slice it into pieces.