Most home bakers find out about gummy crumb the worst way: cutting into a loaf they waited 12 hours for.

But gummy crumb doesn't happen in the oven. It happens during fermentation — and by the time you load your dutch oven, the outcome is already decided.

Here are 3 signs your dough is headed for gummy crumb, and what to do instead:

1. The dough looks "puffy" but hasn't actually domed

Puffiness ≠ fermentation. Gas production without structure means your gluten network isn't trapping CO2 properly. If the surface looks inflated but there's no visible dome or convex shape, you're likely underfermented with excess gas sitting in weak spots. Give it more time. Watch for a smooth, taut surface that holds shape when you tilt the bowl.

2. The poke test rebounds too fast

Everyone talks about the poke test, but most bakers poke too gently. Press a floured finger about 1cm deep. If it bounces back instantly like memory foam — you're under. If it stays as a crater — you're over. You want a slow, partial spring-back that takes 2-3 seconds. That's the window.

3. The dough smells like yogurt, not like bread

Sharp, tangy, lactic acid smell = the bacteria are outpacing the yeast. Your loaf will taste sour and likely have a dense, gummy interior because the acids have weakened the gluten. This usually means your bulk went too long at too warm a temperature. Shorten bulk by 30-60 min or drop ambient temp by 2-3°F.

These three signs — dome shape, poke rebound speed, and aroma — are the fastest fermentation read you can do without any tools.

I built a full cheat sheet around exactly this: reading dough readiness from visual, tactile, and smell cues so you fix problems before the bake, not after. It covers gummy crumb causes, sour flavor fixes, a proofing decision checklist, and a bake-readiness review — all on one printable page.

$19, one-time download, use it forever. No course, no subscription — just a bench-side reference that actually helps.