In a large bowl, whisk together flour, cake mix, pudding and baking soda; set aside.

In a bowl fit with a mixer, cream together butter, brown sugar and sugar on medium speed until smooth (1 -2 minutes). Add the egg to the mixture and beat on high for 1 minute then mix in vanilla extract and continue to beat . Slowly pour dry ingredients into wet and mix on low speed until incorporated. Stir in sprinkles and chocolate chips.

Refrigerate cookie dough for a few hours or up to a few days. Preheat the oven to 350 degrees F then line a cookie sheet with parchment paper. Roll the dough into a mini hot dog (horizontal and short, like a stack)

Press any sprinkles or chocolate chips into the top and bake for about 10 minutes.