Sourdough Starter Jar Warming Mat, Sourdough Jar Heater for All Seasons, 3 Heat Settings

North American 120V Only - Perfect Rise Every Time – Designed specifically for sourdough, this jar heating mat creates the ideal warm environment to activate and maintain your starter, even in cooler kitchens.

Precision Temperature Control – Features preset temperature points optimized by sourdough bakers (64–82°F) to promote strong yeast activity without overheating or killing cultures.

Compact & Purpose-Built – Unlike bulky mug warmers or generic heat mats, this unit is engineered for jar fermentation and takes up minimal counter space.

Reliable, Safe, & Simple – Includes a durable, easy-to-clean warming pad and user-friendly controller with high/low heat settings. Just plug in, place your jar, and ferment with confidence.

Reliable Fermentation Results – Keeps starters warm in cold kitchens or overnight, leading to more bubbles, better rise, and a healthier, more reliable culture.

Bring your sourdough starter to life with the HEMLI Home Sourdough Jar Heating Mat — the minimalist solution for bakers who want consistent fermentation without bulky equipment. Unlike coffee warmers or generic heat pads, this mat was engineered specifically for sourdough. It provides steady, low heat that mimics a warm kitchen environment, keeping your starter active and bubbly even in colder weather. With three optimized heat settings and a compact design, it fits perfectly under standard jars without cluttering your counter. Whether you’re feeding daily or reviving a sluggish culture, the sourdough mat makes sourdough maintenance simple, reliable, and hands-off.