A few years ago, when Interesting Thing of the Day was just a gleam in my eye, I started asking people for their ideas on interesting topics I should write about. One of my wife’s friends made the very first suggestion. “You should write about French butter dishes,” she said, “—you know, the kind that keep butter fresh without refrigeration.” I had no idea what she was talking about, but I wrote it down on my list anyway. After unsuccessfully trying to locate one of these things in France, I did a few Web searches and sure enough, French butter dishes—like the one now in my kitchen—are quite interesting.
The idea behind French butter dishes is pure, ingenious simplicity. Butter at room temperature quickly turns rancid when exposed to oxygen, so the usual means of preserving it is to store it in the refrigerator. But all that’s really needed is to keep air away from the butter. A French butter dish does this by using water to form a seal between the butter and the air. There are two parts to the dish: a smaller, bell- or cone-shaped piece that sits on a wide base, and a second, larger container. You fill the bell up with butter, put water in the larger container, and invert the bell into the water. Because butter is basically an oil, it won’t mix with the water, and as long as it’s not too hot, it will remain sticky enough to stay inside the bell. You can keep this on your kitchen table so that butter is always available without having to soften it. [Article Continues…]