How is butter made?
On a microscopic level, butter is fascinating stuff. It’s been called an “inside out” emulsion since it starts out as dispersion of fat globules in a continuous phase of water (cream) and ends up as a dispersion of water droplets in a continuous phase of fat (butter). Pretty funny, eh?
I said pretty funny, eh???
(Sound of crickets chirping.)
Ehem. So how does this miracle happen? Well it all starts with preparing the cream. The first thing that happens is it’s pasteurized, i.e. heated to 185 or so degrees Fahrenheit. After that the cream is slowly cooled to about 40, at which point something very interesting happens: fat crystals start to form in the mixture. This is an important step for the ultimate texture of the butter, which depends on a careful balance of fat crystals and “free” liquid fat. Too many crystals and the butter will be brittle, too few and the butter will leak liquid fat and be overly soft and “greasy.”
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