Homemade Fermented Butter

A simple way to make creamy, tangy fermented butter at home using heavy cream and buttermilk or yogurt starter.

Ingredients
Heavy cream (33% fat) – 1 liter (4 cups)

Buttermilk or plain yogurt (as starter) – 1/4 cup (60 ml)

Ice water and ice cubes (for washing the butter)

How to Make