Oleo saccharum

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Oleo saccharum ("oil sugar") is a sugar-oil mixture produced by coating citrus or other oil-rich fruit rinds in an excess of sugar. The essential oils extracted into the sugar give a concentrated aromatic mixture rich in terpenes that would otherwise not be possible through aqueous extraction processes due to the oils' hydrophobicity and volatility. In mixology, oleo saccharum can be used to sweeten beverages by their direct use or as an ingredient in flavored syrups. Oleo saccharum is a key component in many punch recipes, being listed as an ingredient as early as 1670. [1] [2] [3] [4]

Oil extraction is greatly accelerated through muddling or mechanical abrasion of the mixture, which helps to rupture oil-rich vacuoles on the rinds' surface or flavedo. [5] A frequent misconception is that oil extraction occurs due to sugar's hygroscopic nature, though this is unlikely as the essential oils being extracted are hydrophobic. This is also the reason why oil extraction via osmosis is also a frequent misconception, as the sugar cannot dissolve in the oil, there can be no sugar-solute based osmotic gradient.

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References

  1. Caiafa, F. (2015). The Waldorf Astoria Bar Book. Penguin Publishing Group. pp. 358–359. ISBN   978-0-14-312480-1.
  2. Ross McCammon; David Wondrich (7 June 2016). Drink Like a Man: The Only Cocktail Guide Anyone Really Needs. Chronicle Books LLC. pp. 22–. ISBN   978-1-4521-4355-2.
  3. Jeffrey Morgenthaler (3 June 2014). The Bar Book: Elements of Cocktail Technique. Chronicle Books LLC. pp. 108–. ISBN   978-1-4521-3027-9.
  4. "Oleo Saccharum". www.diffordsguide.com. Retrieved 2020-08-20.
  5. "Oleo-Saccharum". Libation Laboratory. Retrieved 2020-08-20.