Despite its name, buckwheat isn’t wheat at all — it’s a seed from a flowering plant related to rhubarb and sorrel that makes a surprisingly mild, creamy milk.Credit: Courtesy of New Barn OrganicsKey pointsNew Barn Organics has launched a plant-based milk made with buckwheat, a naturally gluten-free fruit seed that is not related to wheat.The new buckwheat milk has a smooth, neutral flavor and can be used in coffee, smoothies, cereal, overnight o…