What is "bar cookie"?

Bar cookies are a type of cookie made with a dough or batter that is spread into a baking pan and then cut into bars after baking. Bar cookies are often made with a combination of ingredients such as flour, sugar, butter, eggs, and flavorings. They can be topped with a variety of ingredients such as chocolate chips, nuts, dried fruits, and sprinkles. Bar cookies are a popular choice for parties and gatherings, as they are easy to make and can be cut into individual portions.