How and how long can I store browned butter?

Make "Ghee" clarified butter instead. It stores a long time in jars at room temp or in the 'fridge...9 months or more in the 'fridge.

It might take a pound of butter to make a jar...but for frying items it doesn't burn and take a higher temp. A very handy, easy product to make at home, to store and use. the flavor is 'nutty' rich. And I highly recommend making a batch to use for any 'brown butter' application.

Yes, it will go back to being solid, but I have been able to keep it for a couple days.