What is (was) cocavello?

Not a final resolution of this truely babylonian mystery, but some additional pointers.

Using Google Booksearch to also consider historical sources it seems the word cocavello can be found mostly in italian sources, as well as portuguese, spanish and corsican, but for none of this languages automatic translators manage to provide a translation for the term. In italian language the term seems to be used mostly in the context of horses, so portugese or spanish seem to be the more likely sources of the term in the context of drinks.

Then I found two russian anthologies quoting a passage from the same french text whichs origin I could not figure out:

Dites moi ce qu'il faut faire pour la raffer-mir ? On me dit de prendre du café cocavello, et de renoncer entièreinent au thé. Je prie Catinka de m'envoyer une provision de ce café; il fera beaucoup de bien à Micha dont la poitrine est délicate.

Tell me what to do to make it go away? I am told to take coffee cocavello, and to give up tea entirely. I beg Catinka to send me a supply of this coffee; it will do a lot of good to Micha whose chest is delicate.

• ?????? ???????????? ?????????? (Rank of historical sources ) by O. I. Popova, Moscow, 1926
• ????? ???????????????? ????????????? ????? (Proceedings of the State Historical Museum), Moscow, 1926

Comparing this to the passage from Nad Niemnem (p. 205)

Tu? przy nie, z r?k? na chustce zawieszon?, Teresa pi?a kakawelo³⁶⁶, bo kakao e nie s?u?y?o i z opowiadaniem o ?nie dzisiejszym ??czy?a przewidywanie bólu z?bów, dla zapobie?enia któremu ju? u?y?a lekarstwa jednego, a drugie w?a?nie przygotowywa?a, gdy przez wpó?otwarte drzwi buduaru zajrza? Witold i o pozwolenie wej?cia zapyta?.

³⁶⁶ kakawelo — wyraz nienotowany w s?ownikach.[przypis redakcyny]

Right next to them, with her hand hanging on her handkerchief, Teresa was drinking kakawelo³⁶⁶, because cocoa was not good, and with the story of today's dream she was combining the anticipation of a toothache, for the prevention of which she had already used one remedy and was just preparing another, when Witold peeped in through the half-opened door of the boudoir and asked permission to enter.

³⁶⁶ kakawelo - a word not found in dictionaries [editor's note]

it seems cocavello or kakawelo was some kind of coffee or coffee like preparation consumed by the weak or ill, maybe even providing slight painkiller effects.

TL;DR: There is some chance that the drink, if it existed, had a taste combining coconut and chocolate. It is far from clear though, since that usage might be newer.

I agree with Thomas Carroll's suggestion that we need to consider phonetically similar variants. Polish has the rare feature of transcribing all foreign words, even the ones written in its own Latin alphabet, into their phonetic equivalent. Also, considering the geopolitical setting, an exotic drink might have entered the area from Russia, and the name would have been transcribed from whatever a Russian merchant called it (in writing or orally).

This gives us three rather likely potential replacements for "kakawelo". The first is w -> b. This is commonly done at least in Russian (compare e.g. ???????, Vifleem, for Bethlehem). Then there is a -> o, because in Russian, an unstressed o sounds like a. Third, k -> c is also a likely pair, since c in Polish is pronounced close to the zz in pizza. Also, the "l" could be doubled or singular.

With these replacements, I considered names matching coc[oa]bell?[oa]. I actually also tried replacing the first "o" by an "a", but not only is it unlikely (it is stressed); the closest hits were misspellings of the cascabel pepper or of the plant Cascabela Thevetia, which happens to be poisonous.

Luckily, the other searches led to several unrelated hits for "cocobello": different Swiss chocolatiers are offering a chocolate candy under this name, always consisting of a coconut gianduja center with chocolate glaze. There was also coconut-chocolate spread by a UK manufacturer called "cocobella". This is what I consider to be the likeliest taste direction of the drink, since it is the only use which is not bound to a single (modern) brand.

You must also consider that these word variations sound nice, and seem to have been re-invented several times. So, there is also a chance that the antique usage did not survive (it might also have been a brand rather than a generic name) and that the Swiss chocolates are newer. Or, it could even be that the drink never existed and was invented by the author to imply fanciness.