At a Glance
Lupin (lupine) flour is a high-protein legume flour with a nutty flavor and very fine texture. It’s used as a partial substitute for wheat or as a protein-enriching addition in mixed-flour sourdoughs.
💡 Lupin flour is milled from lupin beans (Lupinus species). It is naturally high in protein and fiber, low in starch compared with cereal flours, and contains no gluten. When used in sourdough it contributes flavor, protein and emulsifying properties but cannot form a gluten network on its own [1][2].
🛒 Recommended Products
We recommend the following tools for this recipe:
Digital Kitchen Scale
Essential for accurate measurements when adding low-percentage flours like lupin
Glass Jar for Starter
Good for keeping a small wheat-based refresher to combine with lupin-enriched doughs
Dough Scraper/Bench Knife (OXO)
Helps handle tacky lupin-containing doughs
Banneton Proofing Basket (DOYOLLA)
Supports shaping and proofing slightly stickier doughs when using lupin
Dutch Oven or Cast Iron Pot (CRUSTLOVE)
Provides steam and stable heat for loaves containing lupin
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Properties
| Main ingredient | Lupin beans (legume) |
| Protein content | 30-40% (varies by product) |
| Carbohydrate / starch | Low compared to wheat |
| Fiber | High |
| Gluten | None (naturally gluten-free) |
| Flavor | Nutty, slightly bitter if overused |
⚠️ Because lupin is legume-based it behaves differently than cereal flours: it binds water and fat, improves crumb moisture and can strengthen dough structure via protein and emulsifying components — but it does not replace gluten. Use as a supplement rather than a full replacement in wheat sourdoughs [1][2].
Best Uses
✓ Ideal for:
- • Enriching mixed wheat sourdoughs (10–20%)
- • High-protein sandwich breads and rolls
- • Gluten-reduced recipes when combined with hydrocolloids
- • Flatbreads and crackers for extra protein
✗ Not ideal for:
- • Pure wheat-style loaves relying on gluten for open crumb → Limit lupin to 5–15% of total flour
- • Traditional all-rye sourdoughs → Use lupin only as an inclusion (max 10%)
- • Breads for people with legume allergies
Mixing recommendations:
Behavior in Dough
Consistency
Adds viscosity and stickiness; doughs often feel tacky and more cohesive.
Development
No gluten network from lupin; windowpane still applies only to wheat gluten proportion.
Fermentation
Fermentation rate can be slightly slower because lupin contains fewer fermentable starches; however added assimilable nitrogen can support yeast and sourdough activity [1][2].
Sourdough required!
Sourdough acidification helps modify legume flavors and improves shelf stability by lowering pH; sour fermentation also affects enzyme activity and crumb structure when lupin is present [1].
Minimum: When using lupin at 10–20%, maintain a healthy wheat sourdough at standard refreshment rates; no special lupin-only starter is required.
Hydration
Recommended: Start with the hydration you would use for the base wheat dough and reduce water slightly (2–5%) for every 10% lupin added if dough becomes overly sticky.
Because lupin is high in protein and fiber it binds water differently than wheat — autolyse for 20–30 minutes to let the legume proteins hydrate fully.
Alternatives & Substitutes
Direct alternatives:
Similar protein boost but stronger beany flavor; may affect fermentation differently
Earthier flavor, coarser grind; useful in flatbreads/crackers
High protein, milder flavor; can be used in low percentages
International equivalents:
| Country | Flour | Brands |
|---|---|---|
| Europe | Lupin flour (various brands) | Local mill and health-food brands |
| Australia | Sweet lupin flour | Often available as specialty product |
Where to Buy
🛒 Supermarket
- Local health-food aisles (specialty)
- Some large supermarket chains' organic sections
🌿 Organic
- Natural foods co-ops and health-food stores
🌾 Mills Online
💡 Buy small quantities first to test flavor and freshness. Store airtight in the fridge for longer shelf life.
Storage
Shelf life
4-8 months sealed in a cool place; refrigeration extends life.
Storage location
Airtight container in the refrigerator or freezer for long-term storage to prevent rancidity.
⚠️ As a legume flour lupin can oxidize; cold storage preserves flavor and nutrients.
Recipes with this flour
Ways to use lupin flour in sourdough-based baking: