Preheat the air fryer. Set it to 325°F (160°C) for 3–5 minutes. Preheating helps cookies set quickly and cook evenly.
Prep the basket. Lightly spray the basket or line it with perforated parchment.
Regular parchment can block airflow; if you use it, poke a few holes.
Mix the dough. In a bowl, whisk eggs, oil, and vanilla until smooth. Add cake mix and stir with a spatula just until combined. The dough will be thick and sticky—this is normal.
Add mix-ins. Fold in chocolate chips, sprinkles, or nuts.
Aim for about 1/2 cup for even distribution, up to 1 cup if you like them loaded.
Portion the cookies. Use a cookie scoop or tablespoon to create 1 to 1.5 tablespoon mounds. Roll gently with slightly oiled hands if you want smooth, round cookies.
Arrange for airflow. Place dough balls in a single layer with space between them (about 1.5 inches). Work in batches—crowding leads to uneven cooking.
Air fry. Cook at 325°F (160°C) for 6–8 minutes.
Start checking at 6 minutes. Edges should look set and lightly golden; centers may still appear soft.
Let them rest. Leave cookies in the basket for 2 minutes after cooking. They’ll firm up as they cool.
Then transfer to a cooling rack.
Repeat with remaining dough. If your air fryer runs hot, reduce the time by 30 seconds for later batches.
Enjoy warm or cooled. Serve as-is, or drizzle with melted chocolate or a quick powdered sugar glaze.