Karaköy Güllüoğlu - Nadir Güllü is a pastry shop, serving some of the best baklava in Istanbul since 1949. The master craftsman behind this highly praised bakery is the late Hacı Mustafa Güllü and his four sons, who continue to work in the business today; Nejat, Faruk, Ömer, and Nadir. Pro tip: try the special mix assortment!