Peet’s doesn’t state how much caffeine its nitro cold brew coffees contain on its website. However, Peet’s nitro cold brew caffeine content is largely based on how much caffeine is in its Baridi Blend cold brew. The Baridi Blend iced coffee – when served over ice – is between 113 mg and 187 mg, depending on the size of the cup. But nitro cold brew doesn’t involve any ice, so your caffeine content is higher – and may be about twice as much as you’d get with a cold brew coffee drink – if you choose a nitro coffee. While Dunkin also doesn’t list the caffeine content of its nitro cold brew coffee, most agree that the caffeine in nitro cold brew at Dunkin is around 17.5 mg per ounce. That means a 16-ounce cup has 280 mg of caffeine. The caffeine in nitro cold brew from Dutch Bros also isn’t listed on the company’s website. However, the canned version had more than 25 mg of caffeine per ounce, so that’s a solid baseline.