Step 1: Preheat the Oven: Preheat oven to 350F (175C). Line a baking sheet with parchment paper or a silicone baking mat.
Step 2: Combine Ingredients: In a large bowl, combine the cake mix, melted butter, and eggs. Mix until well combined. The dough will be thick.
Step 3: Add Mix-Ins (Optional): If desired, gently fold in chocolate chips, sprinkles, nuts, or other mix-ins.
Step 4: Portion the Dough: Drop rounded tablespoons of dough onto the prepared baking sheet, leaving about 2 inches between each cookie.
Step 5: Bake the Cookies: Bake for 10-12 minutes, or until the edges are lightly golden. The centers may still appear soft, but they will firm up as they cool.
Step 6: Cool and Serve: Let the cookies cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely. Enjoy!
Tips and Substitutions: For softer cookies, slightly underbake them. For chewier cookies, chill the dough for 30 minutes before baking. Vegetable oil can be used in place of melted butter for a slightly different texture. Gluten-free cake mix can be used to make gluten-free cookies.