The best type of aluminum foil for cooking is heavy-duty aluminum foil. It is thicker and more durable than regular foil, which makes it less likely to tear or puncture. Heavy-duty foil can withstand higher temperatures and is suitable for a variety of cooking methods, including baking, roasting, and grilling. It's also important to choose foil that is food-safe and non-stick, which will prevent food from sticking and make cleanup easier.