ALL ITEMS › sourdough bread | Thunderbird Bakery Image 1 of 6 Image 2 of 6 Image 3 of 6 Image 4 of 6 Image 5 of 6 Image 6 of 6 sourdough bread | Thunderbird Bakery $5.60 sliced loaf Quantity: Add To Cart Added! sliced loaf Naturally leavened sourdough with a mild, tangy flavor produced by Thunderbird Bakery in Oshkosh, WI.