In the bowl of stand mixer fitted with the paddle attachment. Cream together the butter, brown sugar, vanilla sugar, salt, and molasses on medium speed for 7 minutes.
Add in the egg and vanilla extract beat for an additional 4-5 minutes. Add the flour and baking soda and mix well.
With the mixer on add in the sprinkles until thoroughly mixed.
Line a small cookie sheet with parchment paper and scoop the cookie dough out using a dough scooper. Wrap with plastic wrap and chill for 30 minutes.
Preheat oven to 375°F and line a baking sheet with parchment paper. Place the dough on the sheet about 2 inches apart. Bake for 10 minutes. Once the cookies are done baking take them out of the oven and bang the cookie sheet two times on the stove or flat surface. This helps the cookies spread (I was taught this at a resort I worked at in Palm Beach) Enjoy!