Firestone Bakery @ Upper Paya Lebar is a neighborhood bakery in Upper Paya Lebar, Singapore that bakes sourdough bread. It offers sourdough cob, tomato garlic sourdough, focaccia, and kouign-amann. Bread is still being baked when the shop opens around 11:30 AM, so going early is better. At later hours the slicing machine is closed and bread must be cut by hand.