Wash the chestnuts thoroughly and peel off the shells.
Place the peeled chestnuts in a pot, add just enough water to cover, and boil them.
Drain the boiled chestnuts in a sieve and mash them.
Add sugar and fresh cream to the mashed chestnuts and mix evenly.
Cook over low heat, stirring, until smooth and lump-free.
Let the finished chestnut cream cool and use as desired.