Myth: Butter Spoils if Not Refrigerated
**False.* Butter does spoil, but much more slowly than fresh (unfermented) milk products, such as, well, milk. The reason? “Most butter contains added salt, which impedes the growth of spoilage bacteria,” says John Bruhn, a dairy-foods processing specialist at the University of California at Davis. Today’s salted butter, in normal usage, will rarely spoil, even if you leave it unrefrigerated all the time. Unsalted butter might spoil in about a week, but it contains enough natural salt to slow the growth of bacteria that cause spoiling. So you don’t have to worry if you forget to put the butter away after dinner.*
Myth: Boiled Green Veggies Lose All Nutrients
**False*. Yes, green beans stewed until they are gray beans may have lost many of their nutrients―mostly vitamins, which are water soluble, says chef and nutritionist Nancy Berkoff, R.D., a consultant with the Vegetarian Resource Group. But important minerals like iron and potassium don’t break down easily in water. “All vegetables, overcooked or not, are a good source of fiber, too,” says Berkoff. Your best bet: Steam them lightly to the desired consistency. *
Myth: Mushrooms Should Never Be Rinsed
**True and false.* Mushrooms are almost 90 percent water and very porous, so the key to washing them is to give them a shower, not a bath. “You can quickly rinse most mushrooms,” says Julie Petrovick of Modern Mushroom Farms, in Avondale, Pennsylvania. “Just don’t rinse to the point where they are soft.” Soaking mushrooms lets them absorb too much water; they’ll release excess liquid into your dish. For especially delicate varieties, such as oyster mushrooms, porcini, and chanterelles, stick to a special mushroom brush or a damp paper towel.*