Before you make garlic-infused olive oil, it is important to be sure that you've chosen the right ingredients. You will want to use extra virgin olive oil, as this will possess the highest concentration of phenolic compounds and other antioxidants, as well as omega-3 fatty acids and monounsaturated fats. The garlic bulbs you choose should also be undamaged and firm, showing that they have not begun to dry out or shrivel. Once you have the proper ingredients in hand, simply follow the steps below.
Once you have made the oil, you will need to store it safely so it keeps as long as possible. One month is a safe estimate for the shelf life of this infused olive oil, even if you keep it in an airtight container. You can keep this oil at room temperature, but the risk of rancidity is higher, and the quality of the oil will diminish rapidly.