Preheat oven to 375 degrees
In a mixing bowl, cream together softened butter, brown sugar, and granulated sugar.
Add in 2 eggs, milk, and vanilla extract. Mix so everything is combined.
Add in baking soda and salt. Mix to combine.
Gradually beat in flour.
After flour is combined, manually stir in oats. The dough will be quite stiff.
Dump in the bag of Butterfinger Baking Bits. Manually stir to combine.
Place rounded tablespoonful of dough onto baking sheet (no need to spray with non-stick spray).
Bake for 9-12 minutes. Check on cookies at 9 minutes. If they need more time, cook another minute and then check again. Repeat if necessary.
When cookies are done, remove from oven and let "rest" one minute.
Remove cookies to a cooling rack.