A clean break

Being as how they're in season Walnuts are a common sight in Spanish supermarkets and homes around Christmas time. Apparently Britons and Spaniards open walnuts differently.

In the UK, in my youth, Christmas was about the only time of the year we'd have nuts, in shells, in our house. What joy, a reason to bring the crocodile nutcracker out of it's almost perennial hibernation and set it to task. The tail applied the pressure to the nut placed between the beast's jaws.

Now this, plier like, action, is fine for nuts with hard shells - Brazil nuts, hazelnuts and almonds for instance. It was complete overkill for monkey nuts and problematic for walnuts too. Instead of a nice clean break the intricately constructed walnut shells generally shattered when they suddenly lost their structural strength. The crocodile jaws would smack to producing a mixed pile of pulverized nut and shell fragments.

When you buy a net bag of walnuts in Spain they usually come with something that looks like a flat key. The idea is that you put the short end of the key into the crack between the two halves of the nut, the seam of the shell, and twist. The shell splits neatly and leaves the brain shaped half of the nut in one piece. I bet that's how Rowntrees got those nicely shaped nuts on top of their walnut whips.