If you're reading this after scoffing your fifteenth chocolate Santa, don't panic: we humans have been safely enjoying the beans of the cacao plant, Theobroma cacao, for millennia.I wonder how many other readers would find the use of the verb scoff strange here. I only know scoff as meaning 'to deride, mock', and so I assumed that what had happened here was that a BrE-speaking author or (BrE) subeditor/(AmE) copy editor had misspelt the verb to scarf because in their dialect, the /r/ wouldn't be pronounced--and so if they'd not seen the word written down before, they might reason that it's really scoff--a familiar verb that is also onomatopoetic for the action of whipping food into one's mouth. (Some linguists call such errors--where an unfamiliar word is replaced with something that seems to 'make more sense'--eggcorns.)
Except that my reasoning is completely backward. It's fairly frequent that, when faced with two versions of a word, people believe that the version that they came across first is the older version. But, of course, the world doesn't work that way. The OED records scoff as meaning 'devour' from 1846, and lists it as 'slang and dialectal'. Another version of the word, scaff is dated back to 1797, and a slang dictionary records the variant scorf in 1864. On the other hand, the OED doesn't have documentation of AmE scarf until the 1960s. (Though others have found it as early as 1938.) So, instead of an 'r' being lost by speakers of a BrE non-rhotic dialect, we probably have speakers of an AmE dialect (probably one of the non-rhotic ones) inserting an 'r' in the spelling of the word.
The 'eating' meaning of scoff is not particular to BrE--it's used in AmE too, though not by me. (And, of course, the unrelated 'deride' meaning of scoff and the 'neckwear' meaning of scarf are both dialect-neutral and unrelated to the 'eating' homonyms.)
I would have known all this earlier had I not been on my honeymoon in August when the issue was raised and discussed on the American Dialect Society e-mail discussion list. Once again, my personal life interferes with my quest for know-it-all-dom.