Piki bread is a traditional unleavened bread originating from Arizona's Hopi tribe. The bread is made with blue corn and it has numerous papery thin layers. It's cooked on heated piki stones which have been seasoned with either cooked sheep's brains or bone marrow.
These stones are so prized that they're handed down through generations. Piki bread is traditionally made from ground blue corn, water, and juniper ashes, and its flavor is best described as smoky, earthy, and slightly sweet. The preparation is time-consuming, so the bread is reserved for special occasions such as weddings, when the bride and groom eat piki together.