Preheat your oven to 350°F (175°C). This ensures your cookies bake evenly and come out perfectly golden.
Line a baking sheet with parchment paper to prevent the cookies from sticking and to make cleanup easier.
In a large mixing bowl, combine the melted or softened unsalted butter with the eggs. Whisk together until the mixture is smooth and well combined.
Gradually add the cake mix to the wet ingredients. Stir gently until just combined. Be careful not to overmix; it’s okay if a few lumps remain.
Gently fold in your chosen mix-ins (chocolate chips, nuts, etc.) until they are evenly distributed throughout the dough.
Using a cookie scoop or tablespoon, drop rounded balls of cookie dough onto the prepared baking sheet, leaving space between each cookie to allow for spreading.
Bake in the preheated oven for 10-12 minutes, or until the edges are lightly golden. The centers may look slightly underbaked, but they will continue to cook as they cool.
Allow the cookies to cool on the baking sheet for 5 minutes before transferring them to a wire rack to cool completely. Enjoy them warm or at room temperature!
