Do not diagnose a hot, freshly cut loaf. Let bread cool as its recipe directs, then compare the cooled crumb with your baking and fermentation notes. Inadequate cooling, underbaking, and fermentation problems need different responses.
Start with the easiest fact to establish
When was the loaf sliced? If it was still warm, note that before changing the starter or hydration. The Perfect Loaf identifies cutting too early and underproofing as common explanations for a gummy result in its no-knead sourdough guide. That is a useful starting point, not a diagnosis of every loaf.
A moist crumb and a paste-like interior are not interchangeable descriptions. Record whether it leaves a wet smear, compresses into a dense layer, or merely feels chewy. Avoid judging an unfamiliar bread style against a different type of loaf.
Reconstruct the bake
- Did the loaf match the recipe’s size?
- Was the oven preheated as instructed?
- Was the correct covered or uncovered sequence followed?
- Were times shortened because the crust looked dark?
- Was the bread allowed to cool before slicing?
A brown crust alone does not establish that the center finished baking. Follow the selected recipe’s full doneness guidance. Treat thermometers as measuring tools, not a universal temperature shortcut for every bread style.
Then review fermentation
If cooling and baking were consistent with the recipe, look earlier in the process. Check the starter’s activity, temperature, and observations at the end of bulk and final proof. Avoid inferring a precise fermentation error from hole size alone.
Use the bulk fermentation guide to separate the stages. Keep the next test controlled: do not simultaneously change starter amount, water, flour, and proofing time.
Keep a compact comparison
For two consecutive bakes, record the same five things: formula, fermentation observations, oven sequence, cooling interval, and crumb description. This creates a meaningful comparison even without professional photography.
If there is any concern about spoilage or unsafe handling, do not taste the loaf to diagnose it. This guide addresses baking quality; it cannot assess the safety of an individual loaf remotely.
Sources & scope
Source-based explanation and editorial checklists by SourdoughStart, operated by Tag Ad Limited. AI-assisted article revised 2026-10-12. Source links are not endorsements.
Revision note: prepared for the new reference-led edition. Suggest a correction.