Cornell University food scientists have created a new low-calorie 'butter' spread that consists mostly of water. A tablespoon of this low-calorie spread has 2.8 grams of fat and 25.2 calories. Butter, on the other hand, which is 84% fat and about 16% water, has about 11 grams of fat and nearly 100 calories.
source https://phys.org/news/2019-08-butter-low-calorie.html