In fact, it's one of the many reasons that cookies are Americans' favorite dessert to make. Cookies come as all types , shapes, sizes and flavors, and are generally classified as hard or soft depending upon the ingredients. Simple ones can be made from a minimum of ingredients such as flour, beaten egg whites, sugar and flavorings. But, most cookie recipes contain other ingredients as well, in varying amounts that effect the size, color, and eating qualities. Flavorings, chocolate chips, nuts, oatmeal, raisins, etc. can also be added for flavor, texture and interest.
Cookies are little sponges - they absorb moisture from the atmosphere.
On a hot, humid day they can turn from crispy-crunchy to soft and limp within hours. Most cookie recipes will work perfectly when baked in temperate zones from September through mid-June, no matter what the weather. Fortunately, the cooler months are when we feel the most compelled to bake. When your cookie dough mixture is dry, add an egg yolk instead of water. Water makes a dough tough.