Cream together, butter, sugars, vanilla and eggs, then set aside.
Finely grind oatmeal in a blender or food processor. Add the flour, salt, baking powder and soda into the food processor/blender and give is a quick pulse to get everything combined. If your food processor is too small just combine in a bowl. Add dry ingredients to wet and beat just until combined. Grate chocolate bar using a cheese grater and add it, along with chocolate chips and nuts to the batter. Mix just to combine.
Drop by heaping tablespoonfuls, 2 inches apart, on a greased cookie sheet. Bake for 10-12 minutes or until the edges are just starting to get a little brown, don't over bake.
Recipe by THE SEMISWEET SISTERS at https://www.thesemisweetsisters.com/2017/01/05/neiman-marcus-250-oatmeal-chocolate-chip-cookie/