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San Francisco-Style Sourdough Starter

$13.99

Expert Help

Our on-staff fermenters offer support whenever you need a hand. Get in touch.

Free Replacements

If anything goes wrong with your culture, we'll send you a free replacement, though we don't think you'll need one. See our culture guarantee.

Free Shipping Over $49.99

Enjoy free standard shipping on eligible U.S. orders over $49.99. See shipping details.

60-Day No-Hassle Returns

Not what you expected? We offer 60-day, no-hassle returns. See our returns policy.

“I tried to do my own starter with no success. Eventually I decided to just buy the starter from this site, and it started working immediately. I'm not an experienced bread maker, and my first loaves turned out fantastic!”Alice · Sourdough starter customer

Millions of First Loaves. Yours Is Next.

Never baked? Tried and flopped? You’re not starting alone. A proven starter. Clear steps. A support team one message away. Enjoy and share that first warm slice.

Round sourdough loaf cooling on a rack in a home kitchen
Sliced sourdough loaf showing its airy crumb on a wooden board
Scored sourdough loaf beside herbs and olives
Active sourdough starter risen in a glass jar
Flour-dusted sourdough loaf with decorative leaf scoring
Golden sourdough loaf with an open scored crust
Decoratively scored sourdough loaf on a cooling rack
Bubbly sourdough starter in an open glass jar
Two round sourdough loaves cooling side by side
Golden bagels with assorted toppings cooling on a rack
Sliced savory bread and a round loaf on a wooden board
A tray of homemade bagels with seed toppings
Two golden sourdough loaves cooling in a home kitchen
A freshly baked round loaf resting on parchment paper
A filled sandwich made with a golden bread roll

EVERY CULTURE WE MAKE IS FOOD-SAFETY TESTED.

Because it’s going on
your family’s table.

Cultures for Health sourdough starter food-safety lab testing results compared with another starter with unknown results

A MOM’S REASON. OUR STANDARD SINCE 2002.

It started with a simple question:
What am I feeding my children?

Cultures for Health was founded in 2002 by a single mom who wanted to feed her children the best food she could.

That care still shapes what we make. Food-safety testing is a meaningful investment, and one we keep making for the families who bring our cultures home.

Start something good in your kitchen →
An adult and child kneading bread dough together on a floured kitchen counter

From packet to proud-of-it.

Small steps.
Perfect loaves.

Sourdough takes a little patience, not a new personality. Here’s the path.

01

Wake up your starter.

Add flour and water, then follow the included activation guide. Give the culture time to become active before baking.

02

Mix. Rest. Bake.

Follow a sourdough recipe using your active starter. You bring the ingredients and oven; we bring the guide and support.

03

Save a little. Make more.

Keep some starter, feed it, and keep baking. Bread today. Pizza, pancakes, or a new favorite next.

60DAY RETURNS

A little reassurance goes a long way.

60-day guarantee.
Support for as long as you bake.

Get started with 60-day, no-hassle returns. And whenever you have a sourdough question, our on-staff fermenters are here to help. Next week, next month, or next year.

See our guarantee →

San Francisco-Style Sourdough Starter$13.99

Customer Reviews
4.6 Based on 678 Reviews
5 ★
87% 
587
4 ★
4% 
27
3 ★
3% 
19
2 ★
2% 
11
1 ★
4% 
34
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Filter Reviews:
    L
    01/29/2025
    Linda SVG verified by SHOP
    United States United States

    I activated this the day I received it and it took right off! It smells awesome and I will be making my first San Francisco sourdough bread tomorrow. It came with concise instructions and directions to the web site with recipes.

    T
    12/10/2024
    Tara SVG verified by SHOP
    United States United States

    Can’t wait to try this!!! Everything came as expected.

    G
    11/20/2024
    Gail SVG verified by SHOP
    United States United States

    Was very easy to work with and just made my first loaf!!!!

    D
    11/13/2024
    Darla SVG verified by SHOP
    United States United States

    It’s working great so far bubbling faster than expected in the chilly temps.

    N
    11/12/2024
    Nicholas SVG verified by SHOP
    United States United States

    Excited to have all supplies to make sourdough starter & they have an AWESOME website with great recipes & helpful tips to working with sourdough!

    Before you start.

    Good questions.
    Plain-English answers.

    Is this a live starter or a dry packet?

    You’ll receive a dehydrated starter culture. You activate it with flour and water using the included guide before baking.

    How soon can I bake my first loaf?

    Activation takes time, and the pace varies with temperature, flour, and feeding. Follow the guide and use the starter’s activity, not a fixed deadline, to know when it’s ready.

    Will I have to buy a new starter for each loaf?

    No. This is an heirloom culture. Keep a portion of your active starter and feed and maintain it according to the instructions so you can keep baking.

    What else do I need?

    You’ll need flour, water, a jar to keep your starter in, and your usual baking setup. If you don’t have tools yet, our sourdough kits include them.

    What if I’ve tried sourdough before and failed?

    You don’t have to guess your way through it. Start with the included guide, use the troubleshooting resources, and contact our fermenters if something isn’t working. The culture guarantee has replacement support; see the policy for terms.

    Is this gluten-free?

    No. This San Francisco-style starter contains organic white wheat flour and live active cultures. It is manufactured in a facility that processes products containing gluten.

    How does shipping work?

    Free standard shipping is available on qualifying orders of $49.99 or more to the contiguous U.S. Orders below that threshold have an $8 standard shipping rate. Discounts may affect eligibility. Alaska, Hawaii and other non-contiguous destinations have separate rates. Confirm your options and any charges at checkout.