Preheat the oven to 350°F. In a small bowl, whisk together the flour, baking soda, and salt; set aside. In a large bowl, with an electric mixer on medium speed, cream together the butter, brown sugar, and sugar until fluffy. Mix in the eggs and vanilla extract. On low speed, gradually beat in the flour mixture. Stir in the chocolate chunks and nuts.

Drop rounded teaspoonfuls of dough 2 inches apart on ungreased baking sheets. Bake in the center of the oven for about 9 to 10 minutes, or until just set but not browned. Let the cookies cool on the baking sheet for a few minutes, then transfer them to a wire rack to cool completely. Store in an airtight container. Well-wrapped cookies may be frozen.