What's the difference between Spelt Flour and Einkorn Flour?

Spelt Flour: 11.00-13.00% protein, absorption 0.960×, hydration 60-70%. Einkorn Flour: 15.00-17.00% protein, absorption 0.880×, hydration 55-65%.

Can I substitute Spelt Flour for Einkorn Flour 1:1?

Not directly. Absorption differs by 9.1%, so Spelt Flour needs more water. Adjust hydration by 9% when substituting.

Which is better for open-crumb sourdough?

Spelt Flour supports higher hydration (up to 70%), making it better suited to open-crumb hearth loaves than Einkorn Flour (max 65%).

Side-by-side comparison

Spelt Flour vs Einkorn Flour

	Spelt Flour	Einkorn Flour
Protein	11.00–13.00%	15.00–17.00%
Absorption (× bread flour)	0.960	0.880
Hydration range	60–70%	55–65%
Category	ancient-grain	ancient-grain
Ash %	0.70	1.10

Spelt Flour

Spelt is an ancient wheat variety (Triticum spelta) with a delicate, nutty flavor. While protein content looks wheat-comparable (11-13%), spelt gluten is more fragile and soluble — it tears easily and doesn't tolerate extended fermentation. Spelt drinks ~4% less water than bread flour, making it behave opposite to whole wheat. Hydration range is narrower: 60-70% typically. Jovial Foods' organic spelt is the US reference. Use at 20-40% in blends for flavor complexity; 100% spelt loaves require careful handling and shorter fermentation. Pre-pandemic stuck as a niche-but-loyal audience product.

Einkorn Flour

Einkorn (Triticum monococcum) is the oldest cultivated wheat species — genetically unchanged for 10,000+ years. Protein content is high (15-17%) but gluten structure is weak and unstable. Einkorn absorbs ~12% less water than bread flour — the lowest absorption of any sourdough-suitable flour. Works best at 55-65% hydration, producing a tender, cake-like crumb with distinctive sweet nutty flavor. Jovial Foods is the dominant US supplier. Use at 20-40% in blends for flavor and nutrition; 100% einkorn is an advanced-baker project due to handling difficulty. People with modern-wheat sensitivities often tolerate einkorn better — not a celiac-safe claim but anecdotally reported.

Substitution math

When substituting Spelt Flour for Einkorn Flour in a recipe, adjust hydration by about 9% — add more water because Spelt Flour absorbs more than Einkorn Flour.