This cafe specialises in Kürtősh, a Hungarian pastry (chimney cake) that's soft and bread-y inside, and crispy and caramelised outside. All the options with nut toppings (pistachio, hazelnut) are vegan. My two go-to's are the cinnamon kurtosh and the filled biscoff kurtosh (note: the Nutella one is not vegan). They may also have some other vegan treats like choc chip cookies, depending on the day.
Keep in mind if you visit, because the kurtosh is freshly made and not all staff knows how to do it, sometimes they are not available; I've had a few misses in weekday afternoons.