Ampersand Dairy is a British dairy specializing in the production of handcrafted cultured butter and buttermilk. It was founded by Grant Harrington, an experienced chef with international expertise, with the goal of creating the world's most flavorful butter by using traditional and refined techniques combined with the highest quality ingredients.

Their butter is made from the milk of Jersey, Holstein, and Guernsey cows, which are raised in England. The process includes the addition of healthy bacterial cultures and mineral-rich Himalayan pink salt, resulting in butter with a rich and creamy flavor. In addition to butter production, Ampersand Dairy is dedicated to continuous improvement and experimentation with its products, ensuring they remain at the forefront of artisanal dairy production in the United Kingdom.