I think the two top answers really get the prize here. Before I worked for In-N-Out I bought a Double Double, took it home, and put bacon on it. I don't remember it being amazing - though it was certainly delicious, it wasn't quite In-N-Out. read more
The problem is that In N Out probably doesn’t have any use for convection ovens and installing one in every restaurant just to cook bacon would be a waste of space and resources. The addition of a couple of slices of bacon to a meal won’t net them much money, so there’s no profit in reworking their kitchens just to support bacon production. read more