Finally take charge of all that tasty treat decorating you've wanted to do and learn How to Make Royal Icing!
First heat treat the egg whites if you choose to do so. Cook the eggs in a bain marie over low heat for 2-3 minutes, whisking constantly. Do this just until the egg whites have become warm but are not cooking. This will kill any bacteria in the eggs, ensuring them safe to use when raw.
On a stand mixer fitted with a whisk attachment, beat egg whites in a clean, large bowl with the mixer at high speed until foamy, around 2 minutes.