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Butter is a fat made from the cream of cows’ milk. Around 16–17 percent of butter is water, and milk solids make up another 3–4 percent. So ordinary butter is only about 80 percent fat.
What Makes Butter Better?
Because of its rich, creamy mouth feel and its sublime flavor, butter is by far the preferred fat to use for nearly every preparation in the culinary arts. This texture cannot be achieved by other substitutes in the kitchen.
That includes everything from sauce making to baking.
Butter has a melting temperature of 98.6°F, which happens to be the temperature inside your mouth. Vegetable shortening has a higher melting point, which means your mouth isn’t warm enough to melt it, so it can feel greasy in your mouth.
Salted Vs. Unsalted Butter
So what is the difference between salted and unsalted butter? Small amount of salt added as a preservative. However, if you go through your butter reasonably quickly, you shouldn’t have a problem with your butter going bad. Also, in baking, unsalted butter is preferred as you can control the amount of salt to add into your bakes.
While the flavor of butter is highly prized in cooking, there are drawbacks to cooking with butter. For one, it has the lowest low smoke point of any form of fat. The smoke point is the temperature at which fat starts to smoke when heated. Butter starts to smoke at around 350°F.
Sautéeing is a form of cooking that uses very high temperatures (400°F or hotter), so it’s common to use a combination of butter and some other oil, like canola or safflower.
What is Clarified Butter?
Another way to cook with butter at higher temperatures is to use clarified butter. Clarified butter is the pure, golden butterfat from which the milk solids and water have been removed. Because it’s the milk solids that burn the fastest, pure butterfat can be heated much higher (around 450°F) before it starts to smoke.
Clarified butter is also preferred for making a roux, which is one of the most common ways of thickening a sauce. Clarified butter is better for this because the water in ordinary butter can cause an emulsified sauce like Hollandaise to separate.
Baking with butter
When preparing pastry and pie crusts, butter can make the dough slightly more difficult to work with because it’s harder than shortening. On the other hand, shortening doesn’t have any flavour and leave a greasy feeling in your mouth. As a compromise, some bakers use a combination of butter and shortening so that the flavour of the butter is present and the dough is more solid to work with.
Remember also that shortening is pure fat, whereas butter is only about 80 percent fat. So if you substitute one for the other, keep in mind that shortening has 20 percent more fat by weight, while butter brings additional water to the mixture, which could affect how the recipe turns out.