- Preheat Oven 325 degrees.  Use Parchment lined cookie sheets. 
- Combine flour, baking soda and salt in a medium bowl, set aside. 
- In a large bowl,beat butter and both sugars together until well incorporated. Add the egg, yolk and vanilla, mix until incorporated. 
- With the mixer on low speed add the flour mixture to the bowl slowly until just combined. 
- Fold in nuts and chocolate. 
- Chill dough 30 minutes. 
- Preheat oven to 325°F and prepare baking sheets with parchment. 
- Using 1/4 cup measuring cup, scoop dough out, roll into a ball and place onto prepared baking sheets. 
- Bake until golden brown, 12 to 15 minutes. Cool completely before serving.