The traditional 100-pound wheels may only be marked “Swiss Gruyère A.O.P.” if they have been produced in one of the 5 officially recognised districts. Swiss Gruyère A.O.P. has a very old tradition. Its texture is quite dense and compact. Slightly grainy, the cheese has a wonderful complexity of flavours – at first fruity, later more earthy and nutty – well captured in these biscuits.