Butter vs. Margarine: History, Production, and Health Insights

Background

Butter is a soft, yellow‑hued emulsion of butterfat, water, air, and occasionally salt. It originates from the churning of cream and serves as both a spread and a foundational ingredient in cooking and baking. Margarine, an inexpensive alternative, is produced from plant or animal oils through hydrogenation. It is favored by many for its lower fat and cholesterol content compared with butter.

Butter

Butter’s earliest documented references appear in a ninth‑century B.C. Indian etiquette manual, which advised Hindu brides to receive milk, honey, and butter on their wedding day. Its accidental creation is credited to nomadic tribes in Asia around 3500 B.C., who likely churned milk while traveling, allowing the cream to separate and coagulate into butter.

Archaeological evidence of early churns is visible in a Sumerian bas‑relief dated to about 3500 B.C. Butter spread across the Near East and Europe as these peoples migrated, and it was subsequently produced in vertical churns by later civilizations.

Butter played a pivotal role in Indian culture, where the cow is revered. It also appeared in Tibetan religious practices, where yak‑milk butter was smeared on statues. In Europe, the word “butter” derives from the Greek buturon, meaning “cow’s cheese,” later Latinized to butyrum. By the late Middle Ages, butter had become a staple and a valuable trade commodity, even being used in medieval mysticism to “absorb” disease.

The first printed butter‑making instructions date to a 14th‑century Venetian cookbook. By the 17th century, butter trade routes spanned England, Brittany, Flanders, and Iceland. French producers from Vanves were renowned for their superior butter, and regional preferences varied; in southern Europe, where olive oil dominated, butter was sometimes viewed skeptically.

In the United States, early settlers brought cows to North America. Home‑scale butter production involved allowing cream to rise, warming it to about 70 °F (21 °C) to ripen, and then churning in wooden or barrel‑shaped devices. The resulting buttermilk was discarded, and the butter was salted, washed, and packaged in 64‑pound (29 kg) cartons for distribution.

Margarine

Margarine was conceived as a cost‑effective substitute for butter. By the 19th century, butter was a staple for agrarian societies but remained expensive for many. Louis‑Napoléon III of France incentivized the development of a suitable alternative, leading to the creation of margarine in 1869 by Hippolyte Mege‑Mouriez.

The modern margarine manufacturing process centers on hydrogenation, which converts liquid oils into a semi‑solid, “plastic” state. The product must contain at least 80 % fat, sourced from animal or vegetable oils, with 17–18.5 % liquid component derived from milk, water, or soy protein. It is fortified with at least 15 000 IU of vitamin A per pound and may include salt, vitamins D, emulsifiers, preservatives, and coloring agents.

In the United States, the “Margarine Act” of 1950 formally defined margarine and removed taxes that had previously favored butter. During wartime rationing, margarine filled the void left by scarce butter, cementing its place in the American diet.

Raw Materials

Butter is produced exclusively from dairy milk and salt. Margarine’s base can be any edible oil—corn, soybean, safflower—or a blend thereof. Its aqueous phase may be milk, water, or a soy‑protein solution.

Butter Manufacture

Preparation

• Fresh cow’s milk is filtered, classified, and centrifuged to separate cream. The cream is pasteurized at 180 °F (82 °C) for 30 minutes to eliminate pathogens.
• After cooling, the cream enters a large, vertical rotator where it is spun until the cream rises to the surface.

Churning

• The cream is transferred to a large, aluminum churn that can produce 1 500–5 000 lb (681–2 270 kg) of butter per run. The churn’s motion emulsifies the fat, and after about 45 minutes, butter and buttermilk separate.
• Salt is added, the mixture is churned briefly longer, then the butter is collected in a “boat” and wrapped into 64‑pound cartons for distribution.

Margarine Manufacture

Margarine’s production historically relied on beef fat (oleo‑margarine), but modern variants use plant oils. Strict regulatory standards require a minimum 80 % fat content and specified levels of liquid phase and vitamins.

Preparation

• Oils such as safflower, corn, or soybean are treated with caustic soda to remove free fatty acids, then washed, dried under vacuum, and bleached with bleaching earth and charcoal to eliminate colorants.
• The liquid phase—milk, water, or soy protein—is pasteurized and inspected for contaminants.

Hydrogenation

• Hydrogen gas is added under pressure to the oil, raising its melting point and producing a semi‑solid “plastic” consistency.

Combining Ingredients

The continuous‑flow method is predominant. Liquid, salt, and emulsifier (e.g., lecithin from soy or egg yolk) are mixed in one tank; oils and oil‑soluble ingredients in another. These streams feed into an emulsification chamber where temperature is regulated at ~100 °F (38 °C).

Agitation

• In the U.S., a Votator apparatus, standard since the 1930s, cools the emulsion in Chamber A to 45–50 °F (7–10 °C) before transferring it to Chamber B, where it rests or is gently agitated to set the final semi‑solid texture.

Quality Control

Modern creameries and margarine plants adhere to USDA and Department of Agriculture hygiene codes. Inspections enforce cleanliness and prevent bacterial contamination.

Butter is scored by USDA inspectors on flavor (max 45), body & texture (25), color (15), salt content (10), and packaging (5). A perfect score is 100; typically the highest is 93, which classifies the product as Grade AA.

Margarine must meet the same fat and vitamin thresholds, with optional salt substitutes and preservatives to extend shelf life.