In a large bowl combine the butter, shortening and both sugars.
Add the eggs and vanilla
In a separate bowl combine the flour, salt (not the flaky sea salt, set that aside for the end), and baking soda.
Slowly combine the dry ingredients to the wet ingredients.
Add all your chocolate and walnuts. Mix until combined.
Use a ¼ cup measuring spoon to measure out each ball of dough. Then roll out each ball of dough and place them on a baking sheet with parchment paper. Do not press your cookies down. Then put them in the freezer for 15 minutes. Preheat oven to 375 degrees.
Bake cookies for 13-15 minutes
When they come out immediately sprinkle them with a little bit of flaky sea salt. Must use flaky salt do not substitute for regular sea salt.