Lay out 6 strips of foil. Pop a biscuit on each, then top with a square of chocolate and a marshmallow. Sandwich with another biscuit, then wrap up tightly in the foil.

Put the parcels onto a hot BBQ and cook for 3-4 mins on each side, so that the chocolate and marshmallow are just beginning to melt. Use tongs to turn the parcels.

Remove from the BBQ and leave to cool slightly, before carefully unwrapping. If you like, you can stack up the s'mores to serve.