80 Proof Spirits From Used Coffee Grounds

1stincoffee.comSource: Roast Magazine

Researchers in Portugal have created an 80 proof spirit from used coffee grounds. A team from the Institute for Biotechnology and Bioengineering (IBB) at the University of Minho in Braga created the novelty spirit after collecting and drying used coffee grounds from a Portugese coffee roastery.

They heated the powder in water at 163°C for 45 minutes, separated out the liquid, and added sugar. Next, the team mixed in yeast cells, let the concoction ferment, and concentrated the sample to get a higher alcohol content.
The result? A largely non-caffeinated that seems to just meet the threshold for human consumption:

To evaluate the product, eight trained taste testers were brought in and rated the intensity of different smells and flavors in the alcohol. The judges described the drink as smelling like coffee and tasting bitter and pungent. Researchers noted that the taste could be improved with age and concluded that the quality was good enough for consumption.

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