Ingredients for Cooking

---

Flour, sugar, cooking oil, and leavening agents such as baking powder and baking soda are kitchen staples. Most consumers needn't worry about the shelf life of these ingredients because they tend to get used up quickly--long before they've surpassed their shelf life. Although refrigerating these products will extend their shelf life, think twice before you do so. Flour, sugar, baking powder, and baking soda will all absorb moisture, adversely affecting their texture and functionality. Some cooking oils will thicken in the refrigerator, so you'll have to bring them back to room temperature before using them.