Label
All
0
Clear all filters

Homogenization

Appears in
On Food and Cooking

By Harold McGee

Published 2004

  • About

Left to itself, fresh whole milk naturally separates into two phases: fat globules clump together and rise to form the cream layer, leaving a fat-depleted phase below. The treatment called homogenization was developed in France around 1900 to prevent creaming and keep the milk fat evenly—homogeneously—dispersed. It involves pumping hot milk at high pressure through very small nozzles, where the turbulence tears the fat globules apart into smaller ones; their average diameter falls from 4 micrometers to about 1. The sudden increase in globule numbers causes a proportional increase in their surface area, which the original globule membranes are insufficient to cover. The naked fat surface attracts casein particles, which stick and create an artificial coat (nearly a third of the milk’s casein ends up on the globules). The casein particles both weigh the fat globules down and interfere with their usual clumping: and so the fat remains evenly dispersed in the milk. Milk is always pasteurized just before or simultaneously with homogenization to prevent its enzymes from attacking the momentarily unprotected fat globules and producing rancid flavors.

Become a Premium Member to access this page

  • Unlimited, ad-free access to hundreds of the world’s best cookbooks

  • Over 160,000 recipes with thousands more added every month

  • Recommended by leading chefs and food writers

  • Powerful search filters to match your tastes

  • Create collections and add reviews or private notes to any recipe

  • Swipe to browse each cookbook from cover-to-cover

  • Manage your subscription via the My Membership page

Download on the App Store
Pre-register on Google Play
Best value

Part of

The licensor does not allow printing of this title