National Pecan Cookie Day is celebrated worldwide every September 21. This unofficial holiday honors the pecan cookie, a popular homemade treat made with pecans, which are the fruit of the pecan tree, native to Mexico and parts of the United States. To celebrate, people often bake pecan cookies, and a simple recipe includes mixing chopped pecans with butter, sugar, egg yolk, and self-rising flour, then rolling the dough in toasted pecans before baking. While enjoying these cookies, it’s important to consider that some individuals may have allergies to pecans. The day encourages sharing these delicious cookies with family, friends, neighbors, and co-workers.