With their well-known McKenna’s Guides, husband and wife team John and Sally McKenna have been letting diners from around the world know where (and what) to eat in each county, town and even village in Ireland for many years. They possess an almost-encyclopaedic knowledge of not just restaurants, but chefs, culinary technique, ingredients and the nuances that make Irish food culture as unique as it is. Milk might seem like a basic ingredient. It’s not difficult to find, nor very expensive, and chances are, you’ll find it in almost every fridge in the country. It’s deeply ingrained in our daily routine, but easy to take for granted. To John and Sally, it’s much more than a refrigerator staple.