When butter melts and becomes oil ,how do you convert it back to solid butter?

Fridge.When butter melts and becomes oil ,how do you convert it back to solid butter?
You can pour melted butter into a jar and put it in the refrigerator. Alternatively, if it's not too hot, you can pour it into fluted paper cups used to make muffins in a muffin tin and put that in the refrigerator. Then you'll have something more manageable.When butter melts and becomes oil ,how do you convert it back to solid butter?
put it in the refrigerator