The Instant-Read Thermometer That Tells Me Exactly When My Sourdough Is Done

For the longest time, I baked sourdough by feel. I knocked on the bottom of the loaf, listened for that hollow thump, and hoped for the best. Sometimes it worked. Often, I sliced into a loaf that looked perfect on the outside but was still gummy and underbaked in the middle. After destroying two beautiful batards in a single weekend, I finally admitted I needed a proper instant read thermometer for sourdough bread. It felt like cheating at first. Now I consider it the most important tool in my baking kit.

The problem with guessing doneness is that sourdough’s thick crust hides everything. A loaf can look deeply golden and sound hollow when tapped, yet still have a dense, undercooked crumb. Internal temperature is the only reliable signal. Properly baked sourdough should reach somewhere between 205°F and 210°F at its core. Without a thermometer, you are simply guessing inside a very hot oven.

The Thermometer That Ended My Gummy-Center Problem

The hollow-knock test is comforting until you cut into a loaf that sounded perfect but has a dense, underbaked crumb in the center. An instant-read thermometer removes the guesswork entirely—sourdough is truly done when the internal temperature hits 205–210°F, regardless of how golden the crust looks.

What works

• Reads the core temperature in 2–3 seconds, so you’re not opening the oven door for long and losing heat during the critical final minutes of the bake.
• Shows you the exact moment your loaf crosses from underbaked to perfectly proofed—I’ve noticed the difference between 202°F (still slightly tacky crumb) and 208°F (perfect openness) in every loaf since I started tracking.
• The probe is thin enough to insert without leaving a visible hole, and the digital display is large enough to read without glasses (a win for my aging baker eyes).

What doesn’t

• The probe takes a moment to stabilize on the reading, so if you yank it out too fast you’ll see wildly different numbers on repeat checks—wait 2 seconds and hold it still.
• It’s another tool to remember, charge, and store—I left mine in a loaf pan once and didn’t notice until I was mixing dough the next morning.

I was skeptical that a number could replace instinct, but after my third consecutive loaf baked to exactly the right doneness, I stopped second-guessing the thermometer. Pick up the Lonicera Digital Cooking Thermometer for Bread Baking if you’re tired of slicing into surprises.

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