Give your caffeine routine a jolt with these Wirecutter-recommended electric kettles, coffee makers, tea steepers, mug warmers, and more. Few ingredients are as loved (and villainized) as butter.

Which butter warmers are best? One of the most versatile and common ingredients in the kitchen, butter is so delicious that it can be used as a dipping sauce without any other ingredients being added.

But every outfit needs a good frivolous accessory or two, and if I had to choose one for my kitchen, it would have to be a butter warmer. I regard butter, and all dairy, really, with an almost ...