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Sourdough guide

Sourdough Rye Bread: Four Recipes Compared by the Numbers

By Bakers Percent editorial8 min readLast updated Researched guide, AI-assisted (how we make these)

On this page
  1. The four formulas side by side
  2. Why rye behaves differently
  3. Four schedules compared
  4. Baking and doneness
  5. Troubleshooting
  6. FAQ

How this guide was made: it is a researched guide compiled from the published recipes and references listed at the end of this page. We converted each recipe to baker's percentages on the same basis and lined up their schedules and bake settings; we don't claim to have baked these loaves. Every number is attributed so you can check it.

"Rye sourdough" covers everything from a wheat loaf with a handful of rye in it to a dense, all-rye tin loaf. The four recipes compared here span that whole range, from about 30% rye to 100%. The more rye a dough has, the less it behaves like the wheat sourdough you may already know: it absorbs more water, it ferments faster, it can't be kneaded into a stretchy dough, and it needs acidity to bake into a sliceable crumb [5][6].

Quick answers

  • Rye share: about 30% to 100% of the flour across four published recipes [1][2][3][4].
  • Hydration: about 67–85% once the starter is counted [1][2][3][4]. Rye takes up more water than wheat because of its fiber, bran and pentosans [5].
  • Mix gently. Rye can't form gluten the way wheat does, and hard kneading makes it stickier [5].
  • Warm and short. King Arthur suggests a warmer (78°F) and shorter rise for rye doughs, because rye ferments faster [5].
  • Bake hot, then lower: 450–475°F to start for the free-form loaves [1][2][4]; 230°C (about 446°F) for the all-rye tin loaf [3].
  • Done: at least 205°F inside for King Arthur's Jewish rye [5]; 98°C (about 208°F) for BBC Good Food's all-rye loaf [3].
  • Wait before slicing: from 2 hours to a full day, depending on how much rye is in the loaf [1][2][3].

The four formulas side by side

These are baker's percentages, with each ingredient as a share of the total flour (100%). We counted the flour and water inside every starter, levain and poolish. Where a recipe adds a spoonful of "ripe starter" without giving its hydration, we assumed equal weights of flour and water (100% hydration). Our hydration calculator runs the same arithmetic, and baker's percentages, explained shows the method.

Recipe Total flour Rye share Hydration Salt Extras Flour prefermented Yield
Savoring Moments [4] 450 g 33% (44% if your starter is rye) 72% 1.8% none 11% 1 loaf, ~780 g dough
Alton Brown [2] about 663 g 30% (dark rye) 85% 1.4% barley malt syrup 3.0%, caraway 1.2%, yeast in the poolish 25% (levain + poolish) 1 loaf, ~1.25 kg dough
King Arthur Baking (Jeffrey Hamelman) [1] about 441 g 64–66% (medium rye) 67% 2.0% 1 tsp instant yeast; caraway optional 37% (stiff rye starter) 1 loaf, ~745 g dough
BBC Good Food [3] 550 g 100% (wholemeal rye) 82% 1.8% butter for the tin only 9% 1 tin loaf (900 g tin), ~1 kg dough

Figures are our arithmetic from each recipe's published gram weights (script: research/pillars7/formulas.py). BBC Good Food's starter is fed equal weights of rye flour and water [3]; King Arthur's rye starter is built from 152 g rye flour and 113 g water (about 74% hydration) plus a little ripe starter [1]. Counting only the flour and water added in the final mix gives different numbers, which is one reason rye recipes are hard to compare as published.

What the comparison shows:

  • "Rye bread" is mostly a wheat bread in two of the four. Savoring Moments [4] and Alton Brown [2] use about one-third rye, with bread flour doing the structural work. King Arthur's loaf is roughly two-thirds rye [1], and BBC Good Food's is all rye [3].
  • More rye does not always mean more water here. The two highest hydrations are the 30% rye loaf (85%, which also has malt syrup) [2] and the 100% rye loaf (82%) [3]. King Arthur's stiff 64% rye dough is the driest at 67% [1]. Savoring Moments advises adding a bit more water gradually if the dough feels too dry [4].
  • Two of the four add commercial yeast. King Arthur adds a teaspoon of instant yeast to the final dough [1], and Alton Brown's poolish includes 2 g of active dry yeast alongside the sourdough levain [2]. The other two rely on the starter alone [3][4].
  • The starter does more work in high-rye loaves. In King Arthur's recipe over a third of the flour is fermented ahead in the rye starter [1]. IREKS, a baking-ingredient maker, notes that sourdough or acidifiers mainly improve aroma, crumb and keeping quality once rye goes above about 20% of the flour [6].

Why rye behaves differently

The sources agree on four points:

  1. Little gluten structure. Rye contains proteins similar to wheat's, but other properties of the flour stop gluten from developing, and no amount of kneading changes that [5]. Its dough structure relies on pentosans instead [6].
  2. It holds lots of water. Pentosans, fiber and bran make rye flour absorb more water than wheat [5]. Lowering the dough's pH with sourdough makes the pentosans more soluble, so they absorb even more [6].
  3. It ferments fast. Rye has more soluble sugars than wheat, which is why King Arthur recommends a warm, short rise [5].
  4. It turns gummy without acid. Rye flour has strong starch-breaking enzyme (alpha-amylase) activity, and that activity peaks around the temperature at which rye starch gelatinizes (swells and sets) in the oven [6]. If nothing slows it down, the starch structure breaks down, and the crumb can end up damp and soggy, sometimes with the crust pulling away [6]. The enzyme works best at about pH 5 to 5.5, so sourdough's acidity holds it back [6]. King Arthur gives the same reason for why sourdough appears in so many rye recipes [5].

What that means at the bench: mix rye doughs gently, because King Arthur notes that pentosans break down and release water when the dough is overworked [5]. Use wet hands or a little oil rather than extra flour on a sticky rye dough [4]. And for high-rye loaves, give the starter real weight in the formula, as King Arthur's and BBC Good Food's recipes do [1][3].

Four schedules compared

Starter or preferment Mix and first rise Shape and proof Bake day
Savoring Moments [4] feed starter 4–6 h ahead, until doubled 30 min rest, 3–4 sets of folds over 2 h, then 6–8 h until doubled round or oval, banneton; 1–2 h, or fridge overnight same day or next morning
Alton Brown [2] poolish in the fridge 24–72 h; levain 3–5 h until doubled 1 h rest, 4 folds, then about 2½–3 h at 78–80°F until doubled folds again, towel-lined bowl in the fridge 12–24 h day 3 to 5
King Arthur Baking [1] stiff rye starter 14–16 h at room temperature mix about 5 min, rest 30–45 min (little rise) ball, 50–60 min in a warm place same day as mixing (about 16 h total)
BBC Good Food [3] starter fed 12 h ahead rest 2 h, add salt, rest 2 h pressed into a buttered 900 g tin; about 2 h uncovered until risen about a quarter, or fridge overnight same day or next morning

Notice how short the high-rye schedules are once the starter is ripe. King Arthur's loaf goes from mixed dough to oven in under 2 hours [1], which lines up with its blog's advice that rye doughs gain nothing from a long rise and do better warm [5]. If your kitchen runs cool, the water-temperature calculator helps you mix to a target such as 78°F, and our bulk fermentation guide explains how temperature changes rise times.

Baking and doneness

Recipe Oven Time Done when / cooling
Savoring Moments [4] Dutch oven, preheated at 475°F 20 min lid on + 15–20 min off deep golden brown; cool completely before slicing
Alton Brown [2] Dutch oven, preheated 1 h at 450°F; egg-white wash and caraway 20 min lid on + 15 min off very browned and crackly; 15 min in the pot, then at least 2 h on a rack
King Arthur Baking [1] 450°F for 15 min, then 425°F; slash a cross 15 min + 20–30 min golden brown; rest 24 h before slicing for best quality
BBC Good Food [3] 230°C (210°C fan), tin, water poured into a tray below for steam 50–55 min hollow sound, 98°C in the middle; cool at least 4 h
  • Internal temperature runs high for rye. King Arthur's Jewish rye should reach at least 205°F [5], and BBC Good Food's all-rye loaf about 98°C, or 208°F [3]. Compare that with the 190–210°F range on our sandwich bread and whole wheat pages.
  • The more rye, the longer the wait. The roughly one-third-rye loaves ask for about 2 hours [2] or "completely" cool [4]; the all-rye loaf at least 4 hours [3]; King Arthur's two-thirds-rye loaf a full day [1]. Alton Brown warns that cutting too soon can leave the center gummy [2].
  • Keeping: BBC Good Food says its loaf keeps 3–4 days in an airtight container [3]; King Arthur suggests up to about 5 days loosely wrapped at room temperature, or the freezer for longer [1].

Troubleshooting

Problem What the sources suggest
Gummy, wet crumb Rye's enzyme activity breaks down the starch unless acidity holds it back [5][6]. Use a ripe sourdough in high-rye loaves [5][6], bake to at least 205°F [5] and cool fully before slicing [1][2][3].
Dough is very sticky Normal for rye [4][5]. Mix gently [5] and handle with damp hands or a little oil instead of adding flour [4].
Dough feels dry Rye absorbs water differently from wheat; add a little more water gradually [4].
Dense loaf Expected as rye goes up: a 100% rye loaf is much denser than a blend [4]. For a lighter loaf, use more bread flour [4].
Over-risen or collapsed Rye ferments faster than wheat; keep the rise warm but short [5].
Crumb sticky when sliced Wait longer: up to 24 hours for a high-rye loaf [1].

FAQ

What percentage of rye should I use in sourdough? Published recipes range from about 30% rye [2][4] to two-thirds [1] and 100% [3]. Savoring Moments notes that more rye gives a denser loaf and more bread flour a lighter one [4].

What hydration is right for rye sourdough? About 67% to 85% across these four recipes once the starter is counted [1][2][3][4]. Rye absorbs more water than wheat [5], so add water gradually if the dough feels dry [4].

Why is my rye bread gummy? Rye flour's starch-breaking enzymes stay active into baking unless sourdough's acidity slows them down, which can leave the crumb damp and soggy [5][6]. Slicing too soon also leaves the center gummy [2].

Do I need a rye starter? Not for a loaf that's mostly wheat: Savoring Moments and Alton Brown use a regular active starter [2][4]. The high-rye recipes build a rye starter first [1][3]. For keeping one, see our starter guide.

Can I knead rye dough like wheat dough? No. Rye doesn't develop gluten the way wheat does, and rough handling makes it stickier, so mix gently [5].

How long should rye bread cool before slicing? At least 2 hours for a one-third-rye loaf [2], at least 4 hours for an all-rye loaf [3], and King Arthur suggests 24 hours for its two-thirds-rye loaf [1].

What internal temperature means rye bread is done? At least 205°F for King Arthur's Jewish rye [5], or about 98°C (208°F) for BBC Good Food's all-rye loaf [3].

Sources (checked 2026-10-18)

  1. King Arthur Baking (Jeffrey Hamelman), "Jeffrey's Sourdough Rye Bread" (updated 2022-07-08): https://www.kingarthurbaking.com/recipes/jeffreys-sourdough-rye-bread-recipe
  2. Alton Brown, "Sourdough Rye Bread": https://altonbrown.com/recipes/sourdough-rye-bread/
  3. BBC Good Food (Barney Desmazery), "Rye sourdough bread": https://www.bbcgoodfood.com/recipes/rye-sourdough-bread
  4. Savoring Moments (Dinah A.), "Beginner-Friendly Sourdough Rye Bread" (2025-03-01): https://savoringmoments.com/beginner-friendly-sourdough-rye-bread/
  5. King Arthur Baking blog, "How to make Jewish Rye Bread, Part 2" (2016-03-23), drawing on Jeffrey Hamelman's Bread: A Baker's Book of Techniques and Recipes: https://www.kingarthurbaking.com/blog/2016/03/23/make-jewish-rye-bread-part-2
  6. IREKS Compendium of Baking Technology, "Why does rye sourdough have to be acidified?": https://www.ireks-kompendium.com/en/rye-sourdoughs/basics-of-acidification/why-does-rye-sourdough-have-to-be-acidified

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