Cream together the butter and sugars until light and fluffy. Add in the vanilla and eggs one at a time until well blended. Slowly add in the salt, soda, and flour and beat until incorporated. Stir in chocolate chips. Drop by spoonfuls onto ungreased baking sheet and bake for 6-8 minutes or until lightly golden brown. Let cool on wire racks before filling.
Filling:
Beat cream cheese, butter, and vanilla until fluffy. Add sugar and beat until creamy and smooth. If needed add a splash of milk to thin.
Spread onto half of the cookies and top with the remaining cookies. Also delicious frozen!