In a large bowl combine the oats, flour, salt,
baking powder, baking soda, salt,
baking soda, and cinnamon. .... Mix well.
In a separate bowl, beat the butter,shortening, and sugars with an electric mixer for 2 minutes.
Beat in the eggs one at a time.
Blend in the vanilla.
Using a wooden spoon, stir in the dry mixture,about a half at a time.
Add the chocolate chips and walnuts.
Stir until evenly mixed.
Cover and refrigerate for one hour .
While waiting preheat the oven to 350 F.
Lightly butter two large, shiny baking sheets
or just line them with parchment paper.