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San Francisco Sourdough Starter
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San Francisco Sourdough Starter: Active Gold Rush Heirloom

€10.00 – €15.00

Bake a legendary crust with Ireland’s most iconic, wild fermented San Francisco Sourdough. Unlike dry powders, our culture is shipped active and “wet” in a premium unbleached flour base. This ensures your starter arrives bubbling and ready to bake, capturing the world renowned sharp tang and airy, open crumb profile of authentic West Coast sourdough.

  • Gold Rush Heritage: A legendary heirloom culture that matures in complexity over time; one purchase provides a lifetime of artisanal loaves.
  • Active Lactic Fermentation: Our “wet” shipping preserves the specific L. sanfranciscensis bacteria, ensuring it activates faster than dehydrated alternatives.
  • The Baker’s Legacy: Join a community reviving the traditional, slow rise method for a blistered crust, superior digestibility, and that unmistakable San Francisco flavour.

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Description

San Francisco Sourdough Starter Culture

Our San Francisco Sourdough originates from the historic bakeries of the California coast and carries a legendary lineage dating back to the mid 19th century.

This culture is truly iconic! Its history is rooted in the 1849 Gold Rush, where prospectors cherished their sourdough “sponge” as a vital lifeline. This specific strain, containing the world-renowned Lactobacillus sanfranciscensis, is what creates the unmistakably sharp tang and golden, blistered crust that defines authentic West Coast bread.

This is a vigorous, high activity starter with a world class flavour profile!

⭐

NutriBrew Mastery Tip: The Tang Factor

To maximize the iconic San Francisco Tang, try a “Cold Proof.” After your initial fermentation, let your shaped dough rest in the fridge for 12–24 hours. This lower temperature slows down the yeast but allows the lactic acid bacteria to flourish, resulting in a deeper, more complex acidity and a beautifully airy, open crumb.

Master the Art of Sourdough

Whether you are a first time baker or a seasoned pro, our San Francisco culture arrives at peak vitality. Because we feed our starters daily with premium unbleached flour, you receive a resilient, high performance culture that delivers a superior rise and that world famous sourdough flavour from your very first bake.

Authentic Heirloom Starters for the Modern Kitchen

NutriBrew offers a curated collection of premium, high activity sourdough starters, each with a centuries old lineage. We believe a truly great bread is shaped by the history of its cultivation. When you bake with our live cultures, you aren’t just making bread, you are inheriting a unique biological story to be passed down through your own family for generations.

Want to explore a different flavour profile?
While the San Francisco strain is prized for its extra tangy bite, those seeking a milder and more creamy artisan result should explore our Classic White Starter. If you want to move toward deep earthy tones and rustic textures, we recommend trying our Old World Rye.

San Francisco Sourdough Starter: Frequently Asked Questions


Our San Francisco cultures are shipped “active and wet” in a specialised, nutrient dense flour base. This protective environment preserves the delicate balance of wild yeast and specific lactic acid bacteria, ensuring they remain 100% viable for up to 14 days in transit. Unlike dehydrated powders, our live starter is ready to bubble and bake almost immediately upon arrival.

No. This is a genuine heirloom culture with a lineage spanning over a century. With simple weekly feedings of flour and water, your starter is biologically sustainable forever. In fact, the “extra tangy” profile of San Francisco sourdough often becomes more stable and resilient the longer you maintain it in your local environment.

You likely already have the essentials: a clean glass jar, a digital kitchen scale, and a wooden or plastic spoon. To achieve that iconic “West Coast” blistered crust, we recommend using a Dutch oven or a baking stone with steam, but our vigorous starter will produce fantastic results even in a standard loaf tin.

The San Francisco strain is prized for its vigor. It may bubble more rapidly than other varieties. If your starter requires an “acclimation period” to adjust to your local water, this is normal. Within a few feedings, the wild yeast will fully activate, providing the gas production needed for an airy, open crumb bread.

The famous San Francisco tang is created by a specific balance of lactic acid bacteria. To maximise this flavour, try a longer cold fermentation in the refrigerator. This slows down the yeast but allows the bacteria to produce more organic acids, resulting in that sharp, signature taste that West Coast sourdough is known for.

San Francisco yeast is exceptionally vigorous. When it reaches its peak, it can easily triple in volume. We recommend using a glass jar with plenty of headroom to allow for this expansion. If your starter is very active, it is a great sign that it is ready to create a light and airy open crumb in your bread.

Clear or greyish liquid on top is called hooch. It is a sign that your starter is hungry and has finished its last feeding. For the strongest San Francisco flavour, stir this liquid back into the jar. If you prefer a milder taste, simply pour it off before you provide a fresh feeding of flour and water.

Yes. Our San Francisco heirloom is very hardy. If you are going on holiday or taking a break, simply feed the starter and place it in the fridge. This puts the culture into a hibernation state. You only need to take it out and feed it once a week to keep the 100 year old microbes healthy and active.

Look for the peak activity. Your starter is ready when it has significantly expanded and the surface is covered in bubbles. It should have a thick and spongy texture like a mousse. If you drop a small spoonful into a glass of water and it floats, that is a classic sign that the wild yeast is producing enough gas for a perfect rise.

Master Your Sourdough Journey

Activation Guide
The Master Recipe
Sourdough Shop

Additional information

Weight N/A
Sizes

160g, 80g

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