Butter: you use it to make baked potatoes delicious. You smear it on your biscuits and you make finger-licking sauces with it. But what on Earth is going to happen when SHTF and you no longer have access to a grocery store that provides you with it? Nothing, if you’re a good prepper, because you’re going to know how to make your own. Today we’re going to teach you how to make butter at home. We’ll also touch on something that most people don’t know about: canning butter. Keep reading! The Science of Butter It’s always good to know how things work. Butter is formed from the milk fats in the milk. You use cream to make butter, and cream is made up of fat particles suspended in water. When you agitate it by shaking it, it turns to an emulsion of water particles suspended in fat.