Preheat the oven: Preheat oven to 350°F (175°C) and line two baking sheets with parchment paper.
Mix the dough: In a large bowl, stir together the spice cake mix, pumpkin puree, and vanilla until smooth.
Add the mix‑ins: Fold in chocolate chips and most of the candy corn, reserving a few for topping.
Scoop and top: Drop spoonfuls of dough onto prepared baking sheets. Press reserved candy corn pieces gently into the tops of the cookies.
Bake: Bake for 10–12 minutes, until edges are set but centers are still soft.
Cool: Let cookies rest on the baking sheet for 5 minutes before transferring to a cooling rack.