Is Buckwheat Gluten Free?

Buckwheat botany 101

Buckwheat is a pseudocereal — botanically a flowering plant in the Polygonaceae family (related to rhubarb and sorrel). The triangular “groats” are seeds, not grains. There is no biochemical relationship to wheat, and no gluten proteins.

Forms you’ll find buckwheat in

• Groats — raw or toasted (kasha) seeds. Cook like rice.
• Flour — for pancakes, crepes, and GF baking. Dark and earthy.
• Soba noodles — Japanese noodles, traditionally buckwheat-based.
• Buckwheat tea — sobacha. Naturally GF.

The soba noodle warning

Standard soba noodles sold in Japanese restaurants and supermarkets are NOT gluten free. They are made from a mixture of buckwheat and wheat flour — typically 60% buckwheat, 40% wheat (with the buckwheat content called out as “ni-hachi” = 2:8 = 80% buckwheat in higher-quality versions).

100% buckwheat soba (juwari soba) exists but is harder to find. Look for these GF-confirmed brands:

• Eden Foods 100% Buckwheat Soba (GF certified)
• King Soba 100% Buckwheat Noodles
• Aritsugu and small-batch artisanal juwari

Cross-contamination

Like oats and quinoa, buckwheat is sometimes harvested and processed in facilities that also handle wheat. Choose certified GF: Bob’s Red Mill, Anthony’s, Eden Foods, Arrowhead Mills.

Cooking buckwheat groats

1. Toast 1 cup dry groats in a dry pan over medium heat for 3–5 min until fragrant.
2. Add 2 cups water or broth and a pinch of salt.
3. Bring to a boil, reduce to simmer, cover, cook 15–20 min.
4. Off heat, rest covered 5 min. Fluff with a fork.