This Coffee Is Nice But It Needs More Butter

The latest coffee craze involves adding gobs of butter and oil to your coffee. It’s fueled partly by the popularity of the high-fat, low-carb “keto” diet, which encourages followers to embrace fat in order to lose it.

Move over, milk and sugar.

The latest coffee craze involves adding gobs of butter and oil to your coffee. Popping up in coffee shops, grocery stores and diet books, the drinks are riding the popularity of the high-fat, low-carb “keto” diet fad, which encourages people to embrace fat in order to lose it. Fans say the beverages can satisfy like a meal, holding breakfast-skippers comfortably until lunchtime.

At...