Why Your Home Brew’s Caffeine Is Way Higher Than Starbucks’
⏱ 1 min read The Short Version A single cup of home-brewed coffee can pack up to 200mg of caffeine—double Starbucks’ iced coffee—due to over-extraction and neglecting dilution. Home brewers often let coffee sit too long or use too much grounds, leading to a caffeine surge. In This Article The Math Behind the BrewStarbucks’ Secret Sauce Here's something to stir your curiosity: A single cup of home-brewed coffee, made with the same beans as Starbucks’ iced coffee, can contain up to 200mg of caffeine—double the amount in a standard 16oz serving. The discrepancy lies in the interplay between brewing time,…