Oatmeal raisin cookies are a popular type of cookie made primarily from oats, flour, sugar, and raisins. They often include ingredients like butter, eggs, and baking soda, which help create a chewy texture. The oats provide a hearty base, while the raisins add natural sweetness and a chewy contrast. These cookies are often enjoyed as a snack or dessert and are considered a healthier option compared to other cookies due to the fiber content from the oats. They can be found in many bakeries and are also commonly made at home, appealing to both children and adults alike.