Definitely lard, but we never use it any more. We use vegetable oil, but rarely have chips these days. We tend to have home made potato wedges instead.
Beef dripping definitely makes the tastiest chips but you'd get into trouble with your doctor when your cholesterol level is tested!
I don't use any fat at all; just cut up the tatties and put into a very hot oven for about 40 minutes.
I'm old enough to remember when no-one used oil for frying - it was always lard or dripping. A great many people, myself included, didn't like chips fried in oil when they started using it. Incidentally, it's why we in the UK like vinegar on our chips. In those days, it made the chips fried in fat easier to digest, we liked the taste, and so we still do it, (much to the amusement of those living on the Continent!).
Really Heathfield? I didn't know that's why we use vinegar with our chips. I thought it was because it tastes good. I quite like the Continental habit of eating chips with mayonnaise too actually.
Beef Fat,
I had chips made with this at The Swan in West Malling,Kent.
I thought I had died and gone to chippie heaven.
I presume when it said "cooked in Beef Fat" on the menu that it meant fat from the joint rather than lard?
I fry mine in olive oil too but only because it is supposed to be more healthy. For taste you can't beat beef dripping, makes my mouth water thinking about it. But no good if you have high cholesterol - and I have.