2. Raw oatmeal generally needs to be boiled for 20-30 minutes, and it is best to stir it several times in the middle. If raw oatmeal is cooked with other ingredients, the cooking time depends on the specific situation. Of course, it is best to cook raw oatmeal for 20-30 minutes, otherwise the raw oatmeal will be too hard, and people who like to eat soft oatmeal can cook it for longer.