Next, VERY carefully with a serrated knife, make an "X" on the curved side of every chestnut, being sure to just pierce through the shell (reaching the nut, but not making an "X" in the nut - however if you do that is OKAY).
Next soak the nuts in water for about 30 seconds.
Drain and pat dry.
Place nuts on a baking sheet and toss with melted butter.
Place foil over nuts and poke holes through foil which will allow steam to escape.
Set chestnuts on middle rack in oven for about 25-30 minutes. Removing foil after 20 minutes.
Remove chestnuts from oven and let sit for about 10 minutes, or until cool enough to handle and crack open.
Devour immediately, or bring to room temperature and store in fridge until ready to use.
Recipe by My Lavender Blues at https://mylavenderblues.com/buttery-roasted-chestnuts-the-basics-to-home-roasted-chestnuts/