Gebze Bayram Bun, which was made by Fahri Usta, nicknamed Bald Tatar, on holidays, is produced using wheat flour, rye flour, yeast, water, sourdough, margarine, anise, salt, granulated sugar, powdered cinnamon, powdered cloves, powdered mastic gum. The bun, which is among the geographically marked products of Kocaeli, is made especially on eve days.