Creative matcha and flavored lattes with quick counter service near Marble Arch; excellent drinks when on form but service inconsistency and crowding can frustrate.
⚠️ Review concerns: This assessment reflects moderate uncertainty due to questionable review patterns. See details in Authenticity Assessment. Blank Street Coffee delivers solid matcha and flavored latte quality with a convenient Marble Arch location, but inconsistent drink strength and sweetness across visits and split service experiences limit its appeal.
One caveat: Service tone can be brusque; several reports of rude interactions, especially around modifications like less ice