Preheat oven to 350 degrees
Combine the cake mix, oil, and eggs into a standing mixer fitted with a paddle attachment.
Mix until soft dough forms
Add in Reese baking chips, M&M, and pretzels.
Mix until well combined
Take a small ice cream scoop and scoop some dough onto a parchment paper lined baking sheet, 2 inches apart.
Bake for 8-10 minutes
Once baked, pull the sheet out of the oven and let sit for a minute or two
Transfer to a wire rack and let cool before enjoying.