In a large bowl, cream together the melted butter and sugars.
Mix in the egg and vanilla extract, stirring until well combined.
Stir in the salt and baking soda until well combined.
Slowly mix in the flour and cake mix until well combined.
Fold in the sprinkles and both kinds of chocolate chips until just incorporated.
Cover the bowl with plastic wrap and refrigerate for at least two hours.
After the 2 hours is up, preheat the oven to 350.
Scoop the dough onto a baking sheet lined with parchment paper and bake for 10-12 minutes.
Let the cookies cool for 5-10 minutes before transferring to a wire rack to continue cooling.
