The freezer is a better place for butter than your fridge.
You should keep the stick you're actively using in the fridge, but unopened packs of butter can stay frozen, America's Test Kitchen chef and food science expert Dan Souza told Tech Insider.
When your refrigerated stick of butter is running low, move one from the freezer to the fridge — but only when you're ready to use it.
"You can buy a pound of butter, keep three sticks in the freezer, and keep the other one in the fridge," Souza says. "That will keep it really fresh."
This is because the freezer is a great place for fatty foods, he says.
"It’s dark and cold in there," Souza told Tech Insider. "So it slows down rancidity, which is a problem with really fatty things."
Rancidity is what happens when fats start to break down, giving foods an unpleasant taste or smell.
So to make your butter last longer, start storing it in the freezer.
