Meet the FJR Sourdough Starter Warmer Mat, a compact white warming mat designed to support your fermentation routine. It creates a stable warmth niche for your sourdough, keeping the starter within an inviting temperature window so activation and gentle dough growth feel more predictable.

Designed with home bakers in mind, this mat combines a precise thermostat and a 24-hour timer to reduce guesswork. The result is a hands-free warming setup that can adapt to your schedule, rather than demanding constant attention.

Key benefits at a glance

• Precise 1°F control within a 70–100°F range for steady fermentation and proofing.
• 24-hour timer and smart memory on/off for convenient, repeatable warmth.
• Fits jars up to 40 ounces, offering versatility for different starter sizes.
• BPA-free, kitchen-safe materials with overheat protection and auto shut-off for peace of mind.

Practical uses in your baker’s routine

• Activate and maintain sourdough starters, helping steady activity and rise times.
• Proof dough for bread or pizza in a controlled, warm environment that supports consistent texture.
• Gentle tempering of chocolate or other confections in a controlled heat source.

How to use

Place your container on the mat (jar up to 40 oz). Plug it in, set your target temperature and the timer, and let the mat do the work. The vessel is not included, so you can choose your own fermentation jar.

Safety and materials

• Low-wattage heating element with overheat protection.
• Kitchen-safe, BPA-free construction designed for regular kitchen use.
• Compact, space-saving design that fits on most countertops.

What you get in a nutshell

A dedicated warming surface that supports your sourdough from activation through proofing, with an easy-to-use control system and a clean white aesthetic.