The exterior of Matcha Mood on Congress Street in Portland. The cafe bills itself as Portland's first matcha bar. It opened in 2023. (Brianna Soukup/Staff Photographer) I’m a coffee loyalist and know little about green tea’s concentrated format, matcha, aside from its reputation. But I’m sensitive to caffeine, so I’m the perfect candidate for matcha. The green tea variation is known for its moderate caffeine content and smoother come down, avoiding the crash that coffee drinkers know so well.