Beurre noisette (French pronunciation: [bœʁ nwazɛt], literally: hazelnut butter, loosely: brown butter) is a type of warm sauce used in French cuisine. It can accompany savoury foods, such as winter vegetables, pasta, fish, omelettes, and chicken. It has become a popular ingredient in other cultures as well, such as in contemporary American cuisine or the traditional American chocolate chip cookie. It is widely used in making French pastry. It has a deep yellow, almost brown, colour and a nutty scent and flavour from the heating process.