Digital Thermometer (Instant Read)

An instant-read thermometer is the most reliable way to know exactly when your sourdough loaf is fully baked, which is generally around 200°F to 205°F internal temperature. It also helps you control dough fermentation by monitoring the ambient temperature of your kitchen. This precision prevents gummy textures inside the bread.

While a meat thermometer can read temperature, it usually has a thicker metal probe that leaves a larger hole in your delicate bread crumb. Meat thermometers are also often much slower to register a reading compared to instant-read digital models like a Thermopen. A thin-probed digital thermometer prevents your dough from deflating.

To achieve an optimal dough temperature (often around 75°F to 78°F), bakers use their thermometer to calculate the exact water temperature needed during the initial mix. If your room and flour are cold, you will need warmer water (sometimes around 85°F to 90°F) to balance it out. This ensures your bulk fermentation stays on schedule.

Most digital thermometers can be calibrated by plunging the probe into a glass of ice water and holding it for a minute; it should read exactly 32°F (0°C). If it does not, high-end models usually have a calibration nut or a reset button on the back. Regular calibration ensures your baking temperatures remain accurate over time.