they like chocolate.
chocolate, as in the beans has been exported from the americas for a few hundred years now.
trade with south america has been going on since at least the 1500's. that's long enough for something to become a tradition in a country.
i mean the Italians eat pasta, which is noodles, which the Chinese invented. And tomato sauce, comes from tomatoes, also from the Americas. Loads of produce we eat is from the Americas. Potatoes, sugar cane, turkey, cranberries. etc.
UK ppl like chocolate too, and so do the Germans, and lots of Western Countries. I think we like the milk and sugar a lot for one thing. And maybe need a lot of sugar and fat in cold countries, plus the little 'lift' the chocolate gives you.
One thing about it, is it doesn't 'go off' so you can carry it with you on expeditions. any food that doesn't go bad, and has some nutritional value has to be a good thing.