What's The Most Caffeinated Coffee Drink On Dunkin's Menu?

Dunkin's iced coffee versus other brands

Typically, in most coffee shops and chains, cold brew coffee tends to be more concentrated and have higher caffeine content than iced coffee. However, this is not the case at Dunkin'. Their large cold brew has 347 milligrams of caffeine. The reason why the iced coffee has more caffeine than the cold brew is unclear, but it may be due to the use of different coffee roasts. The primary factor influencing caffeine levels is the quantity of coffee grounds used, so it's possible that more grounds are utilized in the iced coffee brewing process.

So, is Dunkin's iced coffee the strongest option available? The Starbucks Trenta, which is a 30-ounce iced coffee, is the closest in size to Dunkin's 32-ounce large and also contains 347 milligrams of caffeine, matching the Dunkin' cold brew. The strongest coffee at Starbucks is the Trenta cold brew, boasting 384 milligrams of caffeine—very potent, yet it still falls short of Dunkin's iced coffee.

Other coffee chains don't even come close. According to Caffeine Informer, McDonald's 32-ounce large iced coffee has a maximum of 320 milligrams of caffeine. Tim Hortons offers both cold brew and iced coffee, with its iced coffee peaking at 285 milligrams in a large 20-ounce cup, as reported by Caffeine Informer. Peet's Coffee also only offers a large size, with no XL or Trenta options, and its 20-ounce large contains 187 milligrams of caffeine. While that's a respectable amount, it may feel a bit weak if you're accustomed to Dunkin'.