Preheat the oven to 350 degrees. Line two baking sheets with parchment paper or a silicone baking mat.

In the bowl of a mixer fitter with the whisk attachment, combine the cake mix, pudding, eggs, oil, and vanilla. Mix on medium speed for 2 minutes. Stir in the pistachios.

Scoop the dough onto the prepared baking sheets using a small ice cream scoop, spacing an inch apart. Bake for 10-12 minutes or until set and just starting to brown around the edges. Let cool.