During the COVID-19 pandemic and run-up to the 2020 U.S. Election, I started watching the Great British Baking Show (a.k.a. Great British Bake Off) on Netflix as a way to reduce stress. When one of the contestants mentioned a “proofing drawer” my ears perked up. Soon I understood that the proofing drawer (a.k.a. warming drawer) as a tool that provided a warm, temperature-controlled environment that would keep a batch of dough happy and growing.
My personal interest in this appliance is driven by the room temperature in my house Berkeley, California, which is usually too cool for most bread fermentation (typically 65 F/18 C)1, but I don’t have space or energy to research and install a commercial proofing drawer.
Evolution of the DIY Proofing Drawer
A few years ago, while living in another house in Berkeley, I also faced the room temperature problem. Full of creative inspiration from the Maker Movement of the time, I built a DIY proofing drawer, using a kitchen cabinet as the container and a 60 Watt incandescent light bulb as the heat source. An Arduino microcontroller with various accessories controlled the temperature in the cabinet. It worked OK, but I didn’t use it much because it was a pain to set up — empty the cabinet, dig out my Arduino stuff, set it up, etc.