Toast the marshmallows over a stovetop gas burner or with a kitchen torch.
Place a square of chocolate atop four graham cracker halves then top the chocolate with a spoonful of the smashed raspberries.
Place the toasted marshmallows atop the raspberries, then sandwich each s'more together with the remaining graham crackers.
Propane gas torches are highly flammable and should be kept away from heat, open flame and prolonged exposure to sunlight. They should be used only in well-ventilated areas. Follow torch manufacturer's instructions for use.