Cas Oh is a drinks industry veteran with over 20 years of experience in some of London's most notable bars and members clubs.

 

Twenty years behind the bar teaches you a lot about cocktails. It also teaches you that the industry has a specs problem.

 

Every new bartender asks the same questions. Every shift, someone's Googling a classic they should know mid-service. Every recipe book contradicts the last one. And nobody can agree on where these drinks actually came from.

 

Oh spent years searching for a complete field manual—a single source with the correct, balanced recipe for every classic a bartender should know. The fundamental 200 that form the essential bedrock of the craft. A book that would eliminate the confusion of endless conflicting versions online and in print. Recipes that were true to their documented origins and balanced to deliver the best-tasting drink. Every iteration of every cocktail tested exhaustively to arrive at the definitive specification.

 

CO Specs is the product of years of obsessive research—digging through primary sources, tracking down original recipes, separating cocktail mythology from documented history. Every recipe has been meticulously researched and tested to deliver the definitive specification.

 

It's the answer to "how do I actually make this drink correctly?" and "where did it come from?"—in one place.

 

CO Specs is the book Oh always wished he'd had: the field manual that sits behind the bar, not on a shelf. The one you reach for before service, not after you've already made the drink wrong. 200 classic cocktails with the specs you can trust and the history that gives you confidence in your craft.