Oven-Roasted Chestnuts with Sea Salt
Roasted chestnuts are a classic seasonal snack with a naturally sweet, buttery flavor and creamy texture inside a crispy shell. This straightforward method uses dry heat in foil to soften the shells and cook the nuts through while keeping them moist. The cross-cut allows steam to escape evenly, preventing shells from shattering. Best enjoyed warm, they make an excellent appetizer, holiday side dish, or casual gathering snack. This version skips complicated blanching techniques—just a quick soak to prepare the shells, then straight into the oven for reliable results. The sea salt finish brings out the chestnuts' natural sweetness. Perfect for autumn and winter entertaining, this dish suits anyone seeking a wholesome, nut-based treat that feels both humble and refined.
Ingredients
- 18 chestnuts
- sea salt flakes, for sprinklingkosher salt or table salt1:1seasoning
coarser texture differs
Instructions
- 1
Heat oven to 400°F/350°F fan/gas 6.
- 2
Place each chestnut flat-side down on a board. Holding one at a time, carefully cut a shallow cross in the top, cutting only through the shell.
- 3
Repeat scoring with all chestnuts.
- 4
Transfer chestnuts to a large heatproof bowl, cover with just-boiled water, place a plate on top, and let sit for 3 mins.
- 5
Lay a large sheet of foil on a baking tray. Arrange drained chestnuts in the center and loosely gather foil edges to form a parcel with an opening at the top.
- 6
Roast until outer shells begin to curl and chestnuts are cooked through, about 25-30 mins.
- 7
Remove from oven, scrunch foil to fully seal the parcel, and rest for 5 mins.
- 8
Tip chestnuts onto a serving plate and scatter with sea salt flakes. Serve warm.
Tips
Score only the shell, not deep into the nut itself. A sharp knife and deliberate pressure help—rushing risks damaging the kernel beneath.
The brief hot-water soak softens shell fibers before roasting, making them easier to peel after cooking and preventing explosive shells in the oven.
Tent foil loosely so steam circulates; too-tight sealing steams the nuts, while too-loose opens cause uneven cooking and drying.
Good to Know
Store cooled roasted chestnuts in an airtight container in a cool place for up to 3 days, or refrigerate for up to 1 week. Reheat gently in foil at 160C for 10 mins if desired.
Score and soak chestnuts up to 4 hours ahead. Wrap in foil and roast when ready to serve; full process takes under 50 mins from oven start to table.
Serve warm as an appetizer, holiday side, snack board, or light starter. Pairs well with spiced wine, cider, or champagne.
Common Mistakes
Score too deep and you crack the nut itself—use light pressure and let the blade do the work.
Skip the water soak and shells may splinter explosively in the oven from trapped moisture.
Seal foil too tightly and chestnuts steam rather than roast, resulting in mushy texture instead of creamy with slight firmness.
Substitutions
coarser texture differs
FAQ
Can I roast chestnuts without soaking them first?
Not recommended. The brief soak softens the shell, allowing controlled steam release through the cross-cut. Skipping it risks shells shattering violently in the dry oven heat. Soak time is minimal and essential for safe, even cooking.
How long do roasted chestnuts keep, and can I freeze them?
Cooled roasted chestnuts store in an airtight container for 3 days at room temperature or 1 week refrigerated. Freeze shelled kernels in freezer bags for up to 3 months. Reheat frozen kernels gently; thawed whole roasted nuts may lose texture quality.
What if my oven doesn't reach 200C exactly?
Use the closest setting. Slightly lower heat (180C) will require a few extra minutes; slightly higher (220C) may brown shells faster. Roasting time ranges 25-35 mins depending on chestnut size and exact temperature. Check for shell curling and test doneness by peeling one.