After years of relying on soda to caffeinate me, I recently decided I wanted to replace my fizzy drinks with coffee. I like the idea of a morning ritual, plus I wanted to cut down on my sugar intake.

On a chilly February afternoon, I stood at my kitchen counter packing precisely measured ground coffee into a $3,000 Lelit Bianca, hoping to master the art—and science—of making impeccable little cups ...

If you're aiming for the Golden Ratio, use one ounce of coffee for every 15 or 16 ounces of water. The so-called Golden Ratio ...