Wiktionary
whipped butter
n. A form of butter aerated with nitrogen to make it more spreadable.
Usage examples of "whipped butter".
Moments later the small table on one side of the sitting room held a basket of fresh bread, a small bowl of whipped butter, and two steaming bowls of soup.
This time the breakfast included fresh berries as well as bread and whipped butter, but otherwise the routine was the same.
David Vynn spooned whipped butter onto his pancakes and, enjoying a dramatic moment, extravagantly flourished his fork.