90% Hydration Light Rye Flour

Is 90% hydration right for Light Rye Flour?

Light Rye Flour's workable hydration range is 68–80%. Its absorption multiplier is 1.03× bread flour. 90% is above Light Rye Flour's typical range. The dough will be slack and may not hold shape in a free-form hearth loaf. Either reduce hydration to 80%, or blend Light Rye Flour (40–60%) with bread flour for structural support.

Absorption math for Light Rye Flour at 90%

A recipe written for bread flour at 90% hydration, when substituted with 100% Light Rye Flour, becomes 93% effective hydration (because Light Rye Flour absorbs 3% more water). Handles closer to wheat than medium or dark rye — light stretch-and-folds are fine at low percentages. Keep the bulk ferment a touch shorter than an all-wheat dough; rye enzymes speed fermentation. Above ~40% rye, switch to no-knead rye handling (mix, rest, wet hands, tight banneton).

Technique at 90% hydration

Dough handling requires constant wet hands, bench scrapers, and oiled surfaces. Include 5% olive oil for lubrication. Pan-baked only. Expert-level technique.

Worked water math for a 500 g batch

Add your levain on top of these weights; the calculator below subtracts the flour and water it already contributes so the bench numbers land at 90% exactly.

What Light Rye Flour gives you at 90%

At 90% hydration you can expect a very open, glossy, holey crumb — the signature of a high-hydration hearth loaf. A very wet dough: minimal handling wins. Use wet hands and a bench scraper, coil or stitch folds only, a strong pre-shape, and a well-floured couche or banneton — this hydration rewards a light, confident touch and punishes over-working.

Light Rye Flour at 90% — FAQ

Calculator pre-set to 90%

Weights below assume 100% Light Rye Flour. For blends, use the main calculator on a recipe page.