Name: Sourdough Marble Rye Bread
Prep time: 30 min
Cook time: 45 min
Total time: 915 min
Ingredients: 100 g active sourdough starter (about ½ cup); 300 g water (1¼ cups); 48 g honey (about 2 tablespoons + 1 teaspoon); 150 g rye flour (about 1¼ cups); 300 g bread flour (about 2½ cups); 10 g salt (about 1¾ teaspoons fine sea salt); 1 teaspoon extra virgin olive oil (divided, for greasing the bowls); 5 g unsweetened cocoa powder (about 2 teaspoons); 10 g molasses (about 1½ teaspoons)

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This sourdough marble rye bread is as delicious as it is beautiful! Perfect for Reuben sandwiches (or any melt, for that matter!). This recipe calls for rye flour and bread flour and combines with active, bubbly sourdough starter for a nutritious and fermented loaf.

Three sourdough marble rye bread slices are shown on a wooden cutting board with the remainder of the sourdough rye bread in the background. You can see the closeup of the marbled swirl in the bread.

One of my favorite diner sandwiches is the Rachel, which is a version of the Reuben but with turkey instead of corned beef. If I’m at a new restaurant, it’s the first thing I search for on the menu.

The meat with melted Swiss cheese, tangy sauerkraut (yum!), and creamy Thousand Island dressing sandwiched between two grilled slices of rye bread is absolute heaven. Last week, I was craving one and decided it was time to perfect my sourdough marble rye bread recipe.

I used my simple sourdough bread recipe as a starting point and made some tweaks to it from there. **This recipe was updated again on 10/19/2026**

This homemade sourdough rye bread is so good! I will walk you through all the steps below, including splitting the dough in half and adding cocoa powder and molasses to achieve the dark contrasting part of the bread.

This recipe is a delicious work of art. I think you’re going to love it! Looking for a spicier sourdough bread recipe? Check out my jalapeno cheddar sourdough bread.

Looking for more sourdough recipes? Check these out:

A closeup of the swirled marble rye bread is shown.

Ingredients

Rye Flour – The star of the show! I used organic rye flour. Use what you can find.
Bread Flour – This has significantly more gluten content than rye and helps the bread be softer, chewier, and less dense.
Warm Water – Not too hot, not too cold.
Active Sourdough Starter – You’ll want to feed your sourdough starter 6-12 hours before beginning this recipe.
Honey – I use regular flavored raw honey. Just make sure you don’t use any honey that is infused with additional flavors such as lavender. We just need sugar to help activate the gluten.
Salt – Every good bread recipe must include salt!
Cocoa Powder – Use unsweetened cocoa powder for this recipe. I used Dutch-processed cocoa powder, but that isn’t necessary if you don’t have it.
Molasses – Unsulfured, mild-flavored molasses is what you’re looking for in this recipe. Do *not* use blackstrap molasses. They are not the same and will produce different results.

Step-By-Step Instructions (With Video Tutorial)

The bulk fermented lighter sourdough rye dough ball is shown in a glass mixing bowl.

Mix the dough. Add the active sourdough starter, water, honey, rye flour, bread flour, and salt to a stand mixer fitted with a dough hook. Knead for 5–7 minutes until smooth and combined.

Divide the dough. Divide the dough into two equal portions. Place one half into a lightly greased bowl and cover with plastic wrap.

The darker rye sourdough dough ball is shown bulk fermented in the bowl.

Make the dark rye dough. Return the remaining dough to the stand mixer. Add the cocoa powder and molasses, mixing until fully incorporated. Transfer to a second greased bowl and cover.

Rest and stretch. Allow both doughs to rest for 1 hour. Perform 1–2 sets of stretch and folds on each portion, approximately 30 minutes apart.

Bulk ferment. Cover both bowls and allow the dough to rise until increased in volume by approximately 50–75%.

The light sourdough rye dough has been rolled out into a rectangle.

Roll out the dough. On a lightly floured surface, roll each portion of dough into a rectangle.

The dark sourdough rye dough has been rolled out into a rectangle.

Make the dark portion’s rectangle a bit smaller than the lighter dough rectangle.

The dark dough rectangle is shown stacked over the lighter dough rectangle.

Create the marble swirl. Place the dark dough rectangle over the lighter dough.

The sourdough marble rye dough has been rolled into a log and the seams have been pinched together.

Starting at one short end, tightly roll the layered dough into a log and pinch the seam closed.

The sourdough marble rye dough is shown in a parchment paper lined loaf pan before its second rise.

Transfer and proof. Place the dough seam-side down into a parchment-lined 9×5-inch loaf pan. Cover and allow to rise until just at the rim, or refrigerate overnight and finish rising before baking. Rye bread does not rise as tall as traditional sourdough bread.

The sourdough marble rye dough is shown in a parchment paper lined loaf pan after its second rise. It has been scored and is ready to be baked.

Bake covered. Score the bread. Preheat the oven to 375°F. Cover the loaf pan with a second inverted loaf pan, if available, and bake for 25 minutes.

Finish baking. Remove the top loaf pan and bake for another 20 minutes, or until the internal temperature reaches 200–205°F.

Cool and slice. Transfer the bread to a wire rack and allow it to cool for at least 1 hour before slicing and enjoying!

The loaf of the swirled marble rye sourdough bread and a couple slices lay on a wooden cutting board.

Tips for the BEST Sourdough Marble Rye Bread

Use an active sourdough starter. For the best rise, use a bubbly, active sourdough starter that has recently been fed and is at or near its peak activity. This recipe assumes a 100% hydration starter.
Expect a slightly sticky dough. Rye flour contains less gluten-forming protein than bread flour, so this dough will feel different from traditional sourdough. Avoid adding too much extra flour while kneading or shaping.
The cocoa powder is for color. A small amount of unsweetened cocoa powder gives the dark rye dough its rich brown appearance without making the finished bread taste like chocolate.
Watch the dough, not the clock. Fermentation times will vary depending on your kitchen temperature, starter strength, and dough temperature. Use the appearance and rise of the dough as your primary guide.
For the best marble pattern, roll the two dough portions into even rectangles, keeping the lighter dough slightly larger than the dark dough. Roll the layered dough snugly to achieve a defined swirl.
Overnight cold fermentation is optional. Refrigerating the shaped dough offers a convenient way to break up the baking process and can further develop the flavor of the bread.
Use a second loaf pan if available. Covering the bread for the first portion of baking helps retain steam and encourages oven spring. If you don’t have a second loaf pan, bake uncovered, monitoring the crust and tenting with foil as needed.
Allow the bread to cool before slicing. Rye flour holds moisture differently than wheat flour, so giving the finished loaf time to cool helps the crumb set and makes slicing easier.

Equipment

Stand mixer with dough hook attachment
Kitchen scale
Measuring cups and spoons
2 medium mixing bowls
Plastic wrap or reusable bowl covers
Rolling pin
Bench scraper or dough scraper
9×5-inch loaf pan
Second 9×5-inch loaf pan (optional, for the double loaf pan baking method)
Parchment paper
Instant-read thermometer
Wire cooling rack
Serrated bread knife

How to Store Sourdough Marble Rye Bread

Room Temperature: Store completely cooled sourdough marble rye bread in an airtight container or bread bag at room temperature for up to 3–4 days. Keep it in a cool, dry place away from direct sunlight to maintain freshness.

Refrigerator: Refrigeration is not recommended, as it can cause the bread to dry out and become stale more quickly.

Freezer: For longer storage, slice the bread and place it in a freezer-safe bag or airtight container. Freeze for up to 3 months. Placing parchment paper between slices makes it easy to remove individual pieces as needed.

Reheating: Allow frozen slices to thaw at room temperature or place them directly into the toaster. For a freshly baked taste, lightly toast the bread before serving.

Helpful Tip: Allow the loaf to cool completely before storing it. Trapping moisture inside a bag or container while the bread is still warm can result in a soggy crust and encourage mold growth.