Keep a sourdough starter at 78 degrees without heating the whole oven
“Proven-seller pick, 4.3 stars across 1,200-plus reviews: the probe reads the actual dough temperature instead of the room, which is why the oven-with-the-light-on trick keeps failing you.”
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The Pakusane SourKeeper is a countertop proofing base that holds a sourdough starter or dough at a set temperature between 70 and 110 degrees F, adjustable in single-degree steps. A stainless steel probe sits in the starter itself and reports real-time temperature, so you are reading the dough rather than the room. A 24-hour timer and an auto-warming switch handle unattended overnight proofs. The 2026 revision widened the heating plate, and the base fits mason jars, glass containers, and most fermentation vessels. Best fit for bakers in cold kitchens, anyone whose starter stalls in winter, and beginners who want the bulk ferment to stop being a guessing game.
Pros
- Stainless probe measures the starter itself, not just the ambient air
- Degree-by-degree control across a 70 to 110 F range with a real-time display
- 24-hour timer and auto on/off handle an overnight bulk ferment unattended
- Fits mason jars, glass containers, and most fermentation vessels
Cons
- It warms and holds temperature but does not chill, so a hot summer kitchen still needs a cooler spot
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Frequently asked questions
Will it fit a standard wide-mouth mason jar?
Yes. The plate is sized for mason jars, glass containers, and similar fermentation vessels, and the probe arm adjusts for different jar heights and shapes.
Can I use it for bulk fermenting dough, not just the starter?
Yes, that is the 2-in-1 part. The 2026 version has a larger heating plate specifically so a dough bowl fits, and the probe can go into the dough.
Does it stay on all night, or does it shut off?
The 24-hour timer plus the auto-warming on/off switch let you run it through an overnight proof without resetting it.
How accurate is the temperature?
It sets in 1 degree F increments and has a built-in sensor that displays the current reading, so you can verify it against the target rather than trusting a dial.
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