Beurre noisette is frequently used in French

France

The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

 pastry

Pastry

Pastry is the name given to various kinds of baked products made from ingredients such as flour, sugar, milk, butter, shortening, baking powder and/or eggs. Small cakes, tarts and other sweet baked products are called "pastries."...

 production. It can also be used as a warm sauce to accompany many foods, such as winter vegetables, pasta, fish, omelettes, and chicken.

Unsalted butter

Butter

Butter is a dairy product made by churning fresh or fermented cream or milk. It is generally used as a spread and a condiment, as well as in cooking applications, such as baking, sauce making, and pan frying...

 is melted over low heat and allowed to separate into butterfat

Butterfat

Butterfat or milkfat is the fatty portion of milk. Milk and cream are often sold according to the amount of butterfat they contain.- Composition :The fatty acids of butterfat are typically composed as follows :...

 and milk

Milk

Milk is a white liquid produced by the mammary glands of mammals. It is the primary source of nutrition for young mammals before they are able to digest other types of food. Early-lactation milk contains colostrum, which carries the mother's antibodies to the baby and can reduce the risk of many...

 solids. The milk solids naturally sink to the bottom of the pan and, if left over gentle heat, will begin to brown. As the milk solids reach a toasty hazelnut color, the pan is removed from the heat. Beurre noisette may be used in its liquid state, or cooled to a solid form. It has a nutty flavour and is particularly included in the batters for madeleines and financiers

Financier (pastry)

A financier is a small French cake, often mistaken for a pastry. The financier is a light, moist teacake, similar to sponge cake, and usually contains almond flour, crushed or ground almonds, or almond flavoring. The basis of the cake itself is beurre noisette , egg whites, powdered sugar and...

.

If beurre noisette is not mixed after preparation but separated in the firm (protein) and liquid (fat) components, the latter is the type of clarified butter

Clarified butter

Clarified butter is milk fat rendered from butter to separate the milk solids and water from the butterfat. Typically, it is produced by melting butter and allowing the different components to separate by density...

 known as ghee

Ghee

Ghee is a class of clarified butter that originated in South Asia and is commonly used in South Asian cuisine....

 in South Asia

South Asia

South Asia, also known as Southern Asia, is the southern region of the Asian continent, which comprises the sub-Himalayan countries and, for some authorities , also includes the adjoining countries to the west and the east...

 and samna in the Arabic countries.