Marble Rye Bread (Sourdough) – Crust & Crumb Academy

Crust & Crumb Academy

Marble Rye Bread (Sourdough)

⏱

Prep

45 min

🔥

Bake

40-45 min

🕐

Total

16-22 hrs

🍞

Yield

1 loaf

🌡

Temp

375°F / 190°C

💧

Hydration

65%

Ingredients

Naturally leavened marble rye with a light sourdough and a dark sourdough built from the same base. The dark gets depth from Dutch process cocoa, molasses, and caraway. Two-day process with overnight cold proof.

Light Rye Levain Dough

Metric	Volume	Ingredient
175g	1⅓ cups	Bread flour
75g	¾ cup	Medium rye flour
155g	⅔ cup	Warm water (80-85°F / 27-29°C)
50g	3 tbsp + 1 tsp	Active sourdough starter (at peak)
10g	2 tsp	Honey
10g	2 tsp	Unsalted butter, softened
5g	1 tsp	Fine sea salt
5g	2 tsp	Caraway seeds

Dark Rye Levain Dough

Metric	Volume	Ingredient
175g	1⅓ cups	Bread flour
75g	¾ cup	Medium rye flour
155g	⅔ cup	Warm water (80-85°F / 27-29°C)
50g	3 tbsp + 1 tsp	Active sourdough starter (at peak)
15g	1 tbsp	Molasses
10g	2 tsp	Honey
10g	2 tsp	Unsalted butter, softened
15g	2 tbsp	Dutch process cocoa powder
5g	1 tsp	Fine sea salt
5g	2 tsp	Caraway seeds
10g	2 tsp	Additional warm water

Egg Wash

Metric	Volume	Ingredient
1	1	Large egg
15g	1 tbsp	Water

Instructions

🧪 Day 1 Morning — Check Your Starter

Float test

Drop a spoonful of starter into water. If it floats or hovers, it's ready. If it sinks, feed it and wait 2-3 hours. The slight enrichment from butter and honey means you need a genuinely peak starter.

🧪 Why Rye Ferments Differently

Rye flour is rich in amylase enzymes that break down starch aggressively during fermentation. At 30% rye, you get enough enzymatic benefit without compromising crumb structure. Higher rye percentages risk a gummy crumb from excessive starch degradation.

🥣 Day 1 Morning — Mix the Light Rye Dough

Combine wet ingredients

Whisk warm water, starter, and honey in your mixer bowl until combined.

Add flour and knead 6 min

Add bread flour, rye flour, salt, and caraway. Mix on low then medium for 5-6 minutes. The dough will be sticky. The pentosans in rye absorb water and create a gel-like quality. This is correct.

Add butter

Add softened butter and knead 2 more minutes. Transfer to oiled bowl and cover.

🥣 Day 1 Morning — Mix the Dark Rye Dough

Combine wet and dry 6 min

Whisk warm water, starter, molasses, and honey. Add bread flour, rye flour, cocoa powder, salt, and caraway. Mix on low then medium 5-6 minutes. Add the additional 10g warm water and knead 1 minute. Add butter and knead 2 more minutes. Transfer to second oiled bowl.

⏰ Day 1 — Bulk Fermentation

Stretch and fold 90 min

At 30, 60, and 90 minutes, perform one set of stretch and folds on each dough. Four folds per set. Do both doughs at each interval.

Rest undisturbed 5-7 hrs total

After folds, rest until 50-60% volume increase. At 75-78°F (24-26°C) this takes 5-7 hours total. Don't wait for a full double with rye. Check at 5 hours. Domed and active means it's ready.

🧪 Over-Fermentation Risk with Rye

When rye dough over-ferments, amylase enzymes break down so much starch that the crumb loses structural integrity. Stay at or under 75-78°F and check at 5 hours. 50-60% rise is the target, not a full double.

🌀 Day 1 Afternoon — Divide and Laminate

Divide, roll, and stack

Turn out both doughs. Divide each in half (4 pieces, ~215g each). Roll each to 10x8 inch rectangle. Stack dark-light-dark-light, pressing firmly between each layer.

Roll into log and pan

Roll from short end into a tight log. Pinch seam. Place seam down in well-greased 9x5 loaf pan.

🌙 Day 1 Evening — Cold Proof

Refrigerate overnight 8-12 hrs

Cover tightly with plastic wrap. Refrigerate 8-12 hours. The acids continue developing slowly overnight, deepening the rye and sourdough flavors. The loaf doesn't need to crown above the rim before baking.

🔥 Day 2 Morning — Final Proof and Bake

Warm up 30-45 min

Remove from fridge. Set at room temperature 30-45 minutes. The dough should feel firm but slightly yielding. Preheat oven to 375°F (190°C).

Egg wash and score

Brush with egg wash. Three diagonal slashes with a lame or sharp knife, about ½ inch deep. Add caraway topping if desired.

Bake covered 15 min

Tent loosely with foil. Bake at 375°F (190°C) for 15 minutes.

Bake uncovered 25-30 min

Remove foil. Bake 25-30 more minutes until deeply golden and internal temp reaches 195-200°F (90-93°C). The darker crust is the molasses and rye sugars caramelizing, not burning.

Cool completely 1-2 hrs

Remove from pan immediately. Cool on wire rack minimum 1 hour. For best results, wait 2 hours. Rye bread continues setting as it cools. The crumb is worth the wait.

💡 Pro Tip

The natural acids from sourdough fermentation act as a preservative. This loaf keeps 4-5 days and the flavor on day 2 is noticeably better than day 1.

Baker's Math

Bread Flour

70%

Rye Flour

30%

Water

65%

Starter

20%

Honey

Butter

Salt

Caraway

Total hydration: 65% · Inoculation: 20% · Dark dough: ~67%

Storage

Room temp: 4-5 days in bread bag or beeswax wrap. Gets better on day 2.

Frozen: Up to 3 months. Slice before freezing.

Refresh: Toast from frozen or warm at 325°F (165°C) for 8-10 min.

Nutrition

Per slice (~65g): 168 cal · 30g carbs · 6g protein · 3g fat · 1g sat fat · 3g fiber · 205mg sodium

Classroom Resources

🎓 Learn the Techniques

🌀

Lamination TechniqueCrust & Crumb Academy

🎬

Shaping BasicsYouTube Tutorial

🔪

Scoring TechniquesYouTube Tutorial

Equipment

Baking Scale · Bench Scraper · SourHouse Goldie (HBK23) · Stand Mixer · 9x5 Loaf Pan · Rolling Pin · Thermometer

Yeasted Version

Want marble rye in 4 hours instead of 2 days? Try the Yeasted Marble Rye — same technique, same swirl, same-day bake.