Here's When You Actually Need to Soften Butter
by A.A. Newton on Skillet, shared by A.A. Newton to L from Lifehacker on (#5CTQ0)

There's no bigger baking disappointment than realizing you forgot to soften the butter. In the interest of eating cake as soon as possible, you might start to wonder: Does this butter really need to be room temperature-and if not, can I just melt it?