With fall just around the corner, now is the time to stock your pantry with hearty, healthy whole grains! From amaranth to wild rice, get the skinny on whole grain ingredients and whole grain flours below. Buckwheat Quick Guides to Whole Grains Amaranth – A tiny poppy seed-sized grain. Malty, grassy flavor. (The leaves of the amaranth plant are also good to eat.) Gluten-free. Barley, Hulled and Pearl – Chewy, tender grains. Especially good in soup.