NDLI: Cold Brew Coffee—Pilot Studies on Definition, Extraction, Consumer Preference, Chemical Characterization and Microbiological Hazards

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Cold Brew Coffee—Pilot Studies on Definition, Extraction, Consumer Preference, Chemical Characterization and Microbiological Hazards

Content Provider	MDPI
Author	Julia, Röhnisch Claassen, Linda Rinderknecht, Maximilian Porth, Theresa Seren, Hatice Scharinger, Andreas Gottstein, Vera Noack, Daniela Schwarz, Steffen Winkler, Gertrud Lachenmeier, Dirk
Copyright Year	2021
Description	Cold brew coffee is a new trend in the coffee industry. This paper presents pilot studies on several aspects of this beverage. Using an online survey, the current practices of cold brew coffee preparation were investigated, identifying a rather large variability with a preference for extraction of medium roasted Arabica coffee using 50–100 g/L at 8 °C for about 1 day. Sensory testing using ranking and triangle tests showed that cold brew may be preferred over iced coffee (cooled down hot extracted coffee). Extraction experiments under different conditions combined with nuclear magnetic resonance (NMR) analysis showed that the usual extraction time may be longer than necessary as most compounds are extracted within only a few hours, while increasing turbulence (e.g., using ultrasonication) and temperature may additionally increase the speed of extraction. NMR analysis also revealed a possible chemical differentiation between cold brew and hot brew using multivariate data analysis. Decreased extraction time and reduced storage times could be beneficial for cold brew product quality as microbiological analysis of commercial samples detected samples with spoilage organisms and contamination with Bacillus cereus.
Starting Page	865
e-ISSN	23048158
DOI	10.3390/foods10040865
Journal	Foods
Issue Number	4
Volume Number	10
Language	English
Publisher	MDPI
Publisher Date	2021-04-15
Access Restriction	Open
Subject Keyword	Foods Coffee Cold Brew Nitro Cold Brew Roasting Extraction Hygiene Risk Assessment Nmr Sensory Analysis
Content Type	Text
Resource Type	Article

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