Lupin flour is made from lupini beans that have been processed to remove most digestible starch. It is extremely high in fiber and protein, resulting in very low net carbohydrates. Lupin flour is popular in low-carb and keto baking as a higher-protein flour alternative.

Quick Carb Snapshot

  • Carbs (per 100 g): ~40 g total, ~3–5 g net
  • Carbs (standard portion): ~1–2 g net per ¼ cup
  • Glycemic Index: Very low
  • Similar Low-Carb Options: Almond flour, sunflower seed flour
  • Blood Sugar Impact: Lower
  • Keto-Friendly? Yes (portion-aware)

Key Traits

  • Texture: Fine, flour-like
  • Flavor: Mildly nutty, slightly bitter
  • Carb Impact: Very low net carbs
  • GI / GL Notes: High fiber blunts glucose response
  • Common Uses: Low-carb breads, pancakes, pasta

Best For

  • High-protein low-carb baking
  • Keto bread recipes
  • Improving structure in nut-flour doughs

Avoid For

  • People with legume allergies
  • Large quantities (can taste bitter)
  • Recipes requiring neutral flavor

Why Choose Lupin Flour for Low-Carb Eating

Texture & Structure

  • Provides elasticity without starch
  • More structure than almond flour alone
  • Does not rise like wheat flour

Flavor & Nutrition

  • Very high protein
  • High fiber content
  • Low glycemic impact

Storage & Shelf Life

Pantry

Store airtight in a cool, dry place.

Cooked

Baked goods keep 3–5 days refrigerated.

Signs It Has Gone Bad

  • Rancid smell
  • Bitter off taste
  • Clumping from moisture

Allergy & Dietary Flags

  • Gluten-Free: Yes
  • Nuts: No (legume)
  • Nightshade: No
  • Vegan / Vegetarian: Yes

Often compared to almond flour and sunflower seed flour, lupin flour
offers higher protein with very low net carbs.

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