"I purchased this based on NutriMill’s product reputation. Excellent warming pad for sourdough. I recommend this to everyone."
Sourdough Warmer
Keep your sourdough culture thriving with the NutriMill Sourdough Warmer, built for bakers who want consistent, reliable fermentation every time. This warmer delivers steady, even heat from either the bottom or the sides, giving your starter a stable environment no matter how drafty or cold your kitchen gets.
Made from durable food-safe silicone, the flexible design fits most jars and containers. Adjustable Velcro bands make side-warming secure and simple, and the compact footprint (5 7/8 inches wide by 6 inches high) sits neatly on your counter without getting in the way. Whether you're nurturing your very first starter or maintaining a long-loved culture, you’ll have the confidence of knowing it’s always in its ideal fermentation zone.
The charging cord and block are included so you can plug in and start using it right away with no extra accessories needed.
Note: The warmer is designed to hold a gentle temperature between 90 and 100°F, which is close to normal body temperature. Because of that, it may not feel hot to the touch. This is intentional; higher heat can damage or kill your starter. That mild warmth is exactly what keeps wild yeast active and thriving.
Crafted from durable food-safe silicone, the warmer flexes to fit most jars and containers. Velcro bands make side heating simple and secure, while its compact size (5 7/8" wide x 6" high) tucks neatly onto your countertop without hogging space. Whether you’re a beginner nurturing your very first culture or a seasoned sourdough pro, you’ll appreciate the confidence of knowing your starter is always in the sweet spot for fermentation.
The charging cord and block are included, so you can plug in, set up, and start feeding your starter right away, no extra gadgets needed.
Why Bakers Love It:
- Precise temperature stability keeps your starter strong and predictable.
- Flexible heating options: bottom for gentle warmth, side for faster activity.
- Compact and countertop-friendly design.
- Ready to use out of the box with cord and block included.
- Built to last with high-quality silicone and secure Velcro bands.
Bring consistency, convenience, and peace of mind to your sourdough ritual. With the NutriMill Sourdough Warmer, every loaf begins with a happy starter.
1 Year Warranty
Sourdough Warmer
Sale price$39.95
Overall rating: 4.5333333 / 5 from 15 reviews.
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It’s ok
"I’ve had it on the counter for about 24 hours now and it still has not gone above 78 degrees. At least it keeps my starter in the 70s during these drafty cold nights."
"I love my warmer. Every product I have bought from Nutrimill is of good quality."
Sourdough Warmer
"I love it!! One of the best things I’ve purchased!!"
Great addition for my wife
"I got this for my wife who’s started making sourdough. She was having difficulty getting the dough to rise on the counter top. This worked perfectly allowing her to get the rise she was hoping for."
Sourdough Warmer
"This little sourdough warmer is the perfect tool to use with your sourdough starter or your sourdough to speed things along especially in a cool kitchen!"
A game changer
"This has been a game changer for my sour dough starter. Even when the house is cold, it keeps the starter at the perfect temperature. i recommend this for everyone who uses a sourdought starter."
Great concept. . . wish it were a bit cooler
"A great concept. Works perfectly. Just wish it was a bit cooler. At 90-100°, my starter gets too warm and I live in NH in a cold house."
"Works well and my glass jar doesn’t slip around."
Love it!
"I love the sourdough warmer so much I bought multiple - one for my sourdough starter and one for my bread while it’s doing the fermentation and proofing and for my mama for her sourdough journey. Game changer! Especially in a really cold kitchen."