On hot days I prepare a 1:8 ratio of ground beans to water and let it soak for 24 h at 4 C. It never felt different from regular hot drip coffee despite hearing that cold brew has a higher caffeine concentration. Guess I know why now - 150 mg in hot drip vs. 207 in cold brew is only a 38% increase in caffeine concentration.
On hot days I prepare a 1:8 ratio of ground beans to water and let it soak for 24 h at 4 C. It never felt different from regular hot drip coffee despite hearing that cold brew has a higher caffeine concentration. Guess I know why now - 150 mg in hot drip vs. 207 in cold brew is only a 38% increase in caffeine concentration.