This place looks a bit crazy, but it has the great vibe of soviet epoque. If you ask anyone in Kyiv, what do they think about this place, with 99% probability you'll hear the answer that they produce the most authentic cinnamon buns. Try them out with cacao. I may be mistaken, but I'd recommend to pay in cash here - not sure you are able to use card.
Yaroslaviv Val St, 13, Kyiv, Ukraine, 02000