/ 175 g butter or margarine

Butter is a concentrated fat product made by churning cream or milk to separate the butterfat from the buttermilk. It is composed of approximately 80-82% milk fat, 16-17% water, and 1-2% milk solids, with a pale yellow to deep golden color depending on the diet and breed of the dairy animals producing the milk. The flavor ranges from sweet and creamy to rich and slightly tangy, with variations influenced by the freshness of the cream, fermentation processes, and salt content. Margarine is a manufactured substitute produced by emulsifying vegetable oils or animal fats with water and milk solids, often fortified with vitamins and designed to mimic butter's physical and culinary properties.

Butter originated in ancient times, with evidence of production dating back several millennia in the Mediterranean and Middle Eastern regions. It became a staple fat in European and North American cooking, while margarine was developed in the 19th century as a more affordable and shelf-stable alternative.

Butter and margarine are fundamental baking and cooking fats used across virtually all culinary traditions. In baking, butter creates laminated doughs (croissants, puff pastry) and tender cakes and cookies through its creaming properties. In savory cooking, it serves as a cooking medium for sautéing vegetables, finishing sauces (beurre blanc), and enriching soups and risottos. Both are used for spreading on bread, toasting, and as ingredients in compound butters. Margarine is commonly employed in baking and cooking where cost or dietary requirements (dairy-free, vegan) are considerations, though it performs differently than butter in laminated doughs due to its higher water content and different fat crystal structure.