In a large bowl or stand mixer cream together the butter and sugars until light and fluffy
Mix in eggs and vanilla extract, followed by the salt, baking soda, and baking powder
Scrape bowl as needed
Mix in the flour until fully Incorporated and no streaks remain
Stir in chocolate chips and walnuts with spatula
Chill cookie dough for 1 hour or until it is thoroughly chilled
Preheat oven to 350 degrees
Line a baking sheet with a non stick baking paper
Scoop dough using a large cookie scoop, spacing 2-3 inches apart on prepared baking sheet
Bake for 12 min
Transfer to a wire rack to cool
Store in a airtight container for up to several days or freeze for later