At a Glance
Cake flour is a very low-protein, finely milled wheat flour designed to produce a tender, fine crumb. In sourdough contexts it’s used for enriched breads, soft rolls, and delicate laminated doughs where a fragile gluten network is desirable.
💡 Cake flour typically contains 6–8% protein and is milled fine; the low protein limits gluten formation, which yields a soft, tender texture. When used in sourdough formulas, adjustments to mixing, hydration, and fermentation are necessary to avoid collapse and overproofing [1].
🛒 Recommended Products
We recommend the following tools for this recipe:
Digital Kitchen Scale
Accurate weighing is essential for precise hydration and recipe scaling
Large Mixing Bowl
Generous bowl for autolyse and mixing without spills
Dough Whisk
Efficiently blends low-protein batters and sticky doughs
Parchment Paper
Useful for shaping and transferring delicate batters
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Properties
| Protein content | 6–8% |
| Extraction rate | Low (very refined) |
| Texture | Very fine, silky |
| Color | Pale white |
| Water absorption | Low-moderate (approx. 55–62%) |
| Best for | Tender crumbs, cakes, soft rolls, enriched doughs |
⚠️ Because cake flour forms only a weak gluten network, it gives softness but limited gas retention; in naturally leavened recipes rely on formula design (preferments, lower hydration, supporting flours) rather than aggressive mechanical development [1][2].
Best Uses
✓ Ideal for:
- • Enriched sourdough rolls and buns
- • Soft sandwich-style loaves with additional strong flour
- • Pastry-style laminated breads
- • Cookies and quick breads with sourdough discard
✗ Not ideal for:
- • High-rise artisan sourdough boules → Use higher-protein wheat (e.g., bread flour)
- • Lean crusty breads requiring strong gluten → Use wheat flour Type 550 or bread flour
Mixing recommendations:
Behavior in Dough
Consistency
Feels slack and silky; less resistance to stretch than higher-protein flours
Development
Gluten develops quickly but is fragile — avoid overmixing
Fermentation
Tends to ferment faster at the same temperature because weaker gluten lets gas escape and acids diffuse
Sourdough required!
Sourdough activity provides acidity and flavor; with weak gluten, prefer gentle preferments (levain) to control gas release and strengthen dough structure via time rather than mechanical work [1].
Minimum: Use a moderate levain (10–20% of total flour) and shorter bulk fermentation to avoid collapse
Hydration
Recommended: 50–62% depending on blending flour
Because water absorption is lower, weight-based hydration using a [Digital Kitchen Scale](https://amzn.to/4pUMVHi) is critical. Start conservative and increase water when blended with stronger flours.
Alternatives & Substitutes
Direct alternatives:
Slightly higher protein (7–9%), more tolerance for shaping
Higher protein (9–11%), better structure but less tender crumb
Mix with bread flour to tune tenderness vs strength
International equivalents:
| Country | Flour | Brands |
|---|---|---|
| USA | Cake flour (Finer-milled, often bleached) | Swans Down, King Arthur (cake flour) |
| UK | Soft plain flour | Doves Farm (soft white) |
| France | Farine T45 (very refined) |
Where to Buy
🛒 Supermarket
- Most large supermarkets stock cake flour or pastry flour
- Baking specialty stores for finer cake flour
🌿 Organic
- Natural food stores and co-ops often stock unbleached cake/pastry flour
🌾 Mills Online
💡 If a recipe calls for cake flour but you only have stronger flour, reduce protein by replacing 20% of that flour with cornstarch (home substitution), then weigh precisely on a [Digital Kitchen Scale](https://amzn.to/4pUMVHi).
Storage
Shelf life
6–12 months sealed; shorter once opened
Storage location
Cool, dry, dark — airtight container
⚠️ Lower-extraction flours oxidize less quickly than whole grain but still benefit from refrigeration if you bake infrequently.
Recipes with this flour
Cake flour is used in these sourdough-adapted recipes and techniques on this site: