San Francisco Sourdough Starter Culture – Heirloom Starter with Easy Activation Guide

Bake real San Francisco sourdough at home. This is a mature, heirloom culture with roots going back more than 175 years. It gives you the tangy flavor and open, chewy crumb that San Francisco sourdough is known for. One packet is all you'll ever need.

Why bakers choose it

• Authentic San Francisco culture. Contains the classic San Francisco pairing of wild yeast (Candida humilis) and bacteria (Lactobacillus sanfranciscensis), which creates the signature tang.
• Foolproof for beginners. Clear, step-by-step printed instructions plus a digital guide (scan the QR code) walk you through the 5-day wake-up. No experience needed.
• A lifetime of bread. Once active, feed it and it keeps going indefinitely. Make boules, baguettes, pizza crust, pancakes, pretzels and more.
• Real help from real bakers. We're a small business. If you have questions while activating, email us and we'll help you troubleshoot until your starter is bubbling.

What you get

• 1 packet of San Francisco sourdough starter culture
• Printed step-by-step activation and feeding instructions
• QR code link to the digital guide

Shipping

Free shipping in the US. Orders are processed the same day and leave on the next USPS pickup. They ship via USPS Ground Advantage with tracking.

Makes a great gift

Have a friend who's been wanting to try sourdough? This is the easiest way to start. It's small, ships fast, and lasts forever.