½ cup 1% milk

Milk is a nutrient-dense liquid secreted by the mammary glands of lactating mammals, most commonly sourced from cows (Bos taurus). Bovine milk is composed of approximately 87% water, with the remainder consisting of proteins (casein and whey), lactose, fats, and micronutrients. The designation "1% milk" refers to milk that has been standardized to contain 1% milk fat by weight through mechanical separation and partial removal of the cream layer, resulting in a thin, pale opaque liquid with a mild, slightly sweet flavor.

The processing of conventional milk involves pasteurization (heat treatment to eliminate pathogens) and homogenization (mechanical disruption of fat globules to prevent separation). 1% milk occupies a middle ground between whole milk (3.25% fat) and skim milk (0.1% fat), offering a compromise between nutritional density and reduced fat content.

Low-fat milk (1%) is widely used in both sweet and savory cooking applications where creaminess is desired without excessive fat. Common uses include preparing sauces, soups, custards, and baked goods, as well as serving as a beverage base for coffee, tea, and smoothies. In baking, 1% milk can be substituted for whole milk in most recipes, though the resulting crumb may be slightly less rich. It is also employed in cream soups, mac and cheese, and creamy pasta dishes where some fat is necessary for mouthfeel but dietary restrictions or preference dictate lower fat content. The lower fat content means sauces made with 1% milk may require additional roux or thickening agents to achieve desired consistency compared to whole milk applications.