The Crumb Lab was built from a simple premise: sourdough baking deserves better tools than guesswork. After years of experimenting with flour blends, hydration levels, fermentation times, and temperature adjustments, we created a studio where every element — from the calculator to the recipe book to the scheduling guides — works together to help you bake consistently great bread.
What We Do
We create tools and guides for sourdough bakers at every level. Our baking calculator helps you design flour blends, visualize hydration ratios, and auto-generate baking schedules tailored to your kitchen temperature and available time. The recipe book features curated artisan breads, discard recipes, and breakfast items — each one tested and refined.
The blog covers everything from fermentation science and flavor development to practical scheduling methods for different lifestyles. Every article is written with the goal of helping you understand why sourdough works, not just how.
Our Philosophy
Sourdough is deeply personal. The flour you choose, the starter you nurture, the temperature of your kitchen — all of it shapes what ends up on your table. We don't believe in one-size-fits-all recipes. Instead, we provide frameworks and tools that adapt to your conditions, so you can develop an intuition for timing, hydration, and fermentation that's uniquely yours.
We focus on artisan techniques — high-hydration doughs, long cold proofs, heritage grains, and natural leavens — because we believe sourdough should be rewarding, not rushed. Every loaf is a conversation between you and your starter.
Built for the Community
The Crumb Lab is designed for the artisan community — whether you're baking your first loaf or your hundredth, there's something here to make your process smoother and your results better. We update the tools, recipes, and guides regularly based on feedback from bakers who use them every week.
If you have suggestions, questions, or just want to share how a particular recipe turned out in your kitchen, we'd love to hear from you. Reach out through the contact page — no personal info required, no tracking, just bread talk.
Editorial Standards
The Crumb Lab is written and maintained by a small editorial team of artisan bakers. Every guide, recipe, and troubleshooting article goes through the same process before it ships:
- •Original testing. Recipes are baked multiple times in real kitchens across a range of flour brands, hydration levels, and ambient temperatures. We don't publish anything we haven't run ourselves.
- •Source-cited claims. Posts that make empirical claims about fermentation, food safety, or nutrition link to the primary source. Where a claim is widely repeated but not primary-sourced, we flag that explicitly in a "What the Research Is Telling Us" footer so readers can weigh the evidence themselves.
- •Independent review. Each piece is reviewed by a second baker before publication. We separate writing from fact-checking.
- •Living documents. Posts are dated, versioned, and updated when better techniques, tools, or evidence emerge. The "last reviewed" date on each post reflects the most recent substantive edit, not a cosmetic one.
- •No personal data. The Crumb Lab is an organization, not an individual persona. We don't use personal bylines, collect reader data, or run newsletter signups. Recommendations are made on the merits of the technique or product, not on affiliate arrangements.
If you spot an error, a missing citation, or a technique that didn't work in your kitchen, the contact page is the fastest way to reach us. Corrections are credited in the post's update log.
Who Writes This
The Crumb Lab is staffed by a small editorial team of artisan bakers. We don't publish personal bylines because the work is collaborative — every post is drafted, tested, fact-checked, and reviewed by at least two people before it ships.
Day-to-day, the team maintains:
- •A publishing cadence. New guides ship roughly twice a month. Recipe and tool updates ship as they're tested and reviewed. The Sourdough September series ships as a connected set over a four-week window.
- •A working test kitchen. Every recipe is baked multiple times across at least two kitchens and three flour brands before it appears on the site. We don't ship a recipe we haven't eaten.
- •A source library. Empirical claims are tied to peer-reviewed primary literature where it exists, named practitioner sources (Maurizio Leo, Andrew Janjigian, the King Arthur test kitchen) where it doesn't, and explicit "widely-attributed but not primary-sourced" footers where the evidence is soft. The full source list lives in the appendix of each post.
- •A reader feedback loop. Bakers email us when a technique didn't work in their kitchen, when a citation is missing, or when a post needs a refresh for a new flour variety. We respond to every message and credit corrections in the post's update log.
The team is small on purpose. Bread rewards the kind of attention that doesn't scale — and we'd rather publish fewer, better posts than more, faster ones. If a post on this site is older than six months and covers a technique that's been refined since, the post will say so at the top. We don't quietly update.