Butter is a staple in many kitchens and makes countless meals, snacks and sweets taste better. Store-bought sticks and tubs are fine, but like many things in life, sometimes homemade is better.

Over in Brittany, France, artisans handcraft what might be the world’s best butter, but with the right technique, you can make a great version at home. That’s where Adam Byatt comes in. The ...

All it takes is cream, motion and a few miles on the trail.