Why use glass bowls for dough?
Fat interferes with the formation of a good foam-and fat clings to plastic. No matter how carefully you clean a plastic bowl, odds are good that a bit of grease remains behind. It’s preferable-and easier!-to use a glass or stainless steel bowl to produce a fluffy meringue. Egg yolks also contain fat, so when you separate the eggs, try to make sure that none of the yolk ends up in your egg whites.
