Preheat oven to 375 degrees.
Blend oatmeal in a blender or food processor to a fine powder.
Cream butter and sugars. Add eggs and vanilla. Mix together with flour, oatmeal, salt, baking powder, and soda. Add chocolate chips, Hershey bar, and nuts.
Roll into balls and place 2 inches apart on an ungreased cookie sheet.
Bake for 10 minutes. Remove to wire rack to cool completely.