Most recipes start with heating oil in a pan. It usually takes a little time for the stove to warm up, so we pour the oil and then turn our backs on the pan to do something else while it heats. Before you know it, you see wisps of smoke, which means the pan is hot and ready for cooking, right? Wrong! Not only do many oils taste bad once they have been heated to or past their smoke point, but when oils are heated to their smoke point or reheated repeatedly, they start to break down, destroying the oil’s beneficial antioxidants and forming harmful compounds. However, an oil’s smoke point is really a temperature range (olive oil’s is between 365° and 420°F), not an absolute number, because many factors affect the chemical properties of oil. You can safely and healthfully cook with any oil by not heating it until it’s smoking—to get your oil hot enough to cook with, just heat it until it shimmers.