Why Your Sourdough Crust Is Too Thick (and How to Fix It)

You pull a gorgeous loaf out of the oven. The color is perfect, the scoring opened beautifully, the kitchen smells incredible. You let it cool (because you are a patient baker who has learned that lesson). You slice into it and, crunch. Not a pleasant crackle, but a jaw-cracking, crumb-scattering, sawing-with-the-bread-knife kind of crunch. The crust is thick enough to use as body armor.

This is one of the most common complaints I hear from home bakers, and the good news is that every cause has a specific fix. Let us walk through them one by one.

1. You Are Baking Too Long

This is the most obvious cause and the one people overlook most often. Every minute your bread spends in the oven past its ideal bake time, the crust gets thicker and harder. Most sourdough loaves are done between 35 and 45 minutes at 450°F (230°C). If you are baking for 50 or 60 minutes, you are drying out the exterior.

The fix: Use a thermometer. Your bread is done when the internal temperature reaches 205 to 210°F (96-99°C). Once it hits that range, pull it out regardless of what the timer says.

2. Your Hydration Is Too Low

Drier doughs produce thicker crusts. If your recipe uses less than 70% hydration, the resulting bread will naturally have a more substantial crust. Higher hydration doughs (75% and above) tend to produce thinner, more crackly crusts because the extra moisture creates more steam during baking.

The fix: If you are comfortable with your hydration levels, try increasing by 5% and see if the crust improves. Going from 70% to 75% can make a noticeable difference.

3. Not Enough Steam in the First Phase

Steam during the first 15 to 20 minutes of baking is critical for crust development. It keeps the surface of the dough moist, allowing it to expand fully before setting. Without steam, the crust forms early and thickens as the bread continues to bake inside.

The fix: If you use a Dutch oven, make sure the lid stays on for the first 20 minutes. If you bake on a stone or sheet, add steam with a pan of boiling water on the rack below, or spray the oven walls with water before closing the door. For alternative steam methods, there are several creative approaches that work well.

4. You Removed the Lid Too Early (Dutch Oven Bakers)

If you bake in a Dutch oven and remove the lid at the 15-minute mark, the bread still has significant rising to do. The exposed surface dries out quickly and forms a thick crust before the loaf has finished expanding.

The fix: Keep the lid on for a full 20 minutes (some bakers go to 25). The trapped steam does the work. When you finally remove the lid, the crust will set quickly but stay thinner because it had maximum time to stretch.

5. Your Oven Temperature Is Off

Many home ovens are inaccurate by 25 to 50°F. If your oven runs hot, it will bake the exterior faster than the interior, creating a thick crust before the crumb is fully set.

The fix: Get an oven thermometer (they cost less than 10 dollars). Place it in the center of your oven and compare it to your oven's display. Adjust your baking temperature accordingly.

6. You Are Not Cooling Properly

This surprises people, but where and how you cool your bread affects the crust. If you leave the loaf on a flat surface, moisture gets trapped underneath and the crust absorbs it, then re-dries unevenly, resulting in a thick, tough bottom crust.

The fix: Always cool your bread on a wire rack. The air circulation underneath keeps the crust even on all sides. Let the loaf cool for at least one hour before cutting, the residual steam inside needs time to redistribute.

A great sourdough crust should be thin enough to shatter when you press it, revealing soft, airy crumb underneath. If yours currently sounds like you are knocking on a door when you tap it, work through this list, the fix is almost always simple. For more crust tips, check out my guide on getting the perfect crusty crust.