Which grain was first farmed nearly 10,000 years ago? Which grain was revered as one of five sacred crops in ancient China? Which grain is mentioned in the Old Testament, the writings of Herodotus, and the journals of Marco Polo? The answer is millet! Bob's Red Mill Whole Grain Millet Flour is nutritious, gluten free and 100% freshly ground on century-old stone-buhr millstones.