The viral world of protein coffee is heading mainstream, and Starbucks is ready to meet the moment by combining nutrition with nostalgia.

The protein cold foam joins a lineup of new items coming to the Starbucks menu, including limited-edition Strato Frappuccinos ...

Most of the new menu items sampled by USA TODAY, including a new protein cold foam, will see additional testing before being released nationwide.

Starbucks' new set of creamers appear to all have been inspired by fan-favorite menu items, including its Maple Pecan Latte ...