Cream butter and sugars. Add eggs and vanilla and mix well. In a separate bowl combine flour, salt and soda. Whisk dry ingredients together well, and then stir into the wet ingredients. Fold in chocolate chips. Use two separate scoops of cookie dough to sandwich each Oreo. Seal the edges. Place 12 cookies to a sheet on parchment paper. Bake for 11-13 minutes at 350, or until golden brown. These are very large, and so we cut them in half for kids to enjoy. They would make really fun ice cream sandwiches!