I think it was made from Gruyere and the bread was grilled with this compound herb butter, decadent and amazing ... as far as screwing up grilled cheese, it's mostly about the bread - if you don't cook it long enough or use too much fat and the bread is soft and wilted that's no good...or if you don't use fat at all and it's TOO hard and crusty and it's like you put cheese between slices of stale bread