How to Tell When Sourdough Is Properly Proofed

Knowing when your sourdough is ready to bake is the skill that separates a good loaf from a flat, dense, or gummy one. You do not need any special tools, just the ability to read a few physical signs in the dough.

What "Proofed" Actually Means

When we say a dough is proofed, we mean it has fermented long enough after shaping for the gases from your starter to expand the loaf. The yeast and bacteria in a healthy starter generate carbon dioxide, which inflates the air pockets that become your crumb. The goal is to bake when those pockets are well-developed but before the gluten network gets too tired to hold them.

Sourdough proofing happens in two stages. The first, bulk fermentation, happens in the bowl right after mixing. The second, called the final proof (or shaping proof), happens after you shape the dough and place it in a banneton or loaf pan. This guide focuses on the final proof, because that is where most beginners get tripped up.

If your starter is still young or unpredictable, the proofing signs described here will be harder to read and less consistent. Take a look at how to make a sourdough starter from scratch before worrying too much about proofing timing.

The Poke Test

The sourdough poke test is the most reliable beginner-friendly method for checking the final proof. Here is how to do it:

1. Dust your fingertip lightly with flour.
2. Press about half an inch into the surface of the shaped dough.
3. Watch what happens over the next 5 to 10 seconds.

What each result means:

• Properly proofed: The indentation springs back slowly and only partway. It fills in about halfway, then stops. The dough feels airy and pillowy but still has structure.
• Underproofed: The indentation springs back immediately and completely, like a rubber band snapping. The gluten is still tight and fermentation is not finished.
• Overproofed: The indentation does not spring back at all, or the dough collapses slightly around the hole. The gluten has broken down from too much acid and extended fermentation.

The poke test works best on a cold-proofed dough that has been retarded in the fridge overnight. Room-temperature doughs move faster, so the window between underproofed and overproofed is narrower.

The Jiggle Test

Before you even poke the dough, give the banneton a gentle shake. Pick it up and move it side to side. A properly proofed loaf will jiggle like firm set gelatin: it holds its shape but has a subtle wobble that tells you gas has developed throughout. An underproofed dough feels stiff and dense, with almost no movement. An overproofed dough may slump or jiggle excessively and lose its dome as you handle it.

The jiggle test is especially helpful for high-hydration doughs (75% and above), where the poke test can be harder to read because the dough is naturally soft and slack.

Visual Signs to Check Before You Score

Dome Shape

Look at the top of the dough in the banneton. A properly proofed loaf should show a gentle, rounded dome. If the surface is still flat or the dough looks tight, it probably needs more time. If the dome has peaked and is starting to flatten or fall over the edges of the banneton, it has likely gone too far.

High-hydration doughs may not build as tall a dome as stiffer doughs. Judge those more by feel than by height.

Volume Increase

During the final proof, a shaped loaf should grow by roughly 50 to 75 percent in volume. It will not double the way a commercial-yeast loaf often does, and it should not look dramatically puffy. What you want is a noticeably larger, softer-looking dough with a slight give when you carry it.

Do not expect the same volume increase every time. Warmer kitchens move faster. A well-fed, active starter will push more quickly than one that is sluggish. See how to feed and maintain a sourdough starter for guidance on keeping your starter at peak activity.

Bubbles Near the Surface

Just before you flip the dough onto your peel or into the Dutch oven, check the surface. Small bubbles poking up through the flour dusting are a good sign. They indicate fermentation is active all the way through the dough, not just at the edges. Very large bubbles or a frothy, aerated surface suggest the dough has proofed too long.

How Temperature Changes the Timeline

This is where beginners often get confused: sourdough proofing is not a fixed amount of time. It is a process that speeds up or slows down depending on how warm or cool the dough environment is.

Warm kitchens (above 75 degrees F / 24 degrees C): Fermentation moves quickly. A shaped loaf may be ready in as little as 2 to 3 hours at room temperature. Check it early.

Cool kitchens (65 to 70 degrees F / 18 to 21 degrees C): The same loaf might take 5 to 8 hours at room temperature.

Refrigerator proofing (34 to 38 degrees F / 1 to 3 degrees C): Cold proofing slows fermentation enough that the loaf can sit safely overnight and up to about 18 hours without overproofing. Cold-proofed loaves are easier to score and often have better flavor.

A very common mistake is setting a timer based on a recipe and walking away. The recipe writer may have tested in a 70-degree kitchen with a mature starter. Your kitchen in summer could be 80 degrees, which means the dough will finish well ahead of that estimate. Use time as a rough guide only. The physical tests are always more reliable than the clock.

If you are finding that your dough never seems to rise the way a recipe describes, the cause is often starter health rather than technique. Why your sourdough starter is not rising and how to fix it covers the most common causes.

Quick Reference: Under, Properly, and Over-Proofed

Sign	Underproofed	Properly Proofed	Overproofed
Poke test	Springs back fast and fully	Springs back slowly, about halfway	Does not spring back; may collapse
Jiggle	Stiff, little movement	Gentle wobble, holds shape	Slumps or wobbles excessively
Dome	Flat or tight	Rounded, gentle rise	Peaked and falling over edges
Surface bubbles	Few or none visible	Small, even bubbles	Large bubbles or frothy texture
Volume	Little change from shaped dough	Roughly 50-75 percent larger	Ballooned and very soft
Baked result	Dense crumb, large holes near top, thick crust	Open crumb, good ear, good bloom	Flat loaf, little oven spring, can taste sour or gummy

Frequently Asked Questions

Can I bake overproofed sourdough?

You can, but the result will likely be flat and dense. The gluten structure breaks down during overproofing and the dough cannot hold gas in the oven, so you get little or no oven spring. If you catch overproofing early and the dough is just past the ideal window, try putting it in the freezer for 20 to 30 minutes before baking. Firming it up cold can sometimes help it hold its shape through the oven spring phase.

What if I am not sure it is ready?

When in doubt, err slightly toward underproofed. An underproofed dough still has active yeast and gluten strength, so it will spring well in the oven. You may get a dense spot or a large tear along the side, but the loaf will taste good and have real structure. An overproofed loaf has spent most of its energy before it ever hits the heat.

Does the poke test work on all hydration levels?

It is most reliable on medium-hydration doughs (roughly 68 to 75 percent). Very slack doughs (80 percent and above) are naturally soft and do not give you a clear rebound signal. For those, rely more on the jiggle test and dome shape. Very stiff doughs (below 65 percent) will feel tighter and may give a more muted result even when properly proofed.

How long should the final proof take?

There is no single answer. A room-temperature final proof typically runs 3 to 8 hours, depending on your kitchen temperature and starter activity. A cold refrigerator proof runs 8 to 18 hours. Always use the physical tests as your primary signal, not the clock.

My dough passed the poke test but still came out flat. What went wrong?

A few things can cause this. The loaf may have overproofed during the time you spent preheating the oven and loading the Dutch oven. Your scoring may have been too shallow to let the loaf open up. Or the Dutch oven may not have been hot enough when the dough went in. Preheat the Dutch oven for at least 45 minutes at 500 degrees F (260 degrees C), and score quickly the moment the dough comes out of the fridge. A cold, firm dough is much easier to score cleanly.