Weigh out the amount of hot starch base required for the recipe.
Slowly combine the warm mixture with the partially melted chocolate to make an emulsion using a spatula.
Immediately mix to make a perfect emulsion.
Add the cold cream.
Mix again.
Ideally, leave to set in the refrigerator for 12 hours at 40°F (4°C).
Whisk until the texture is firm enough to use in a piping bag or with a spatula.