Preheat oven to 325 degrees F. Prepare cookie sheets with silicone mat or parchment paper.
In a large bowl, sift together flour, salt and baking soda. Set aside.
In a mixing bowl combine butter and sugars and beat until well combined, at least 2-3 minutes to allow ingredients to combine fully. Add in egg, egg yolk and vanilla and beat until well combined.
Combine wet and dry ingredients until just combined, do not over mix. Fold in chocolate chips.
Drop or scoop cookie approximately 1/4 cup of cookie dough for each cookie onto prepared baking sheets. Make sure to leave at least 3" between cookies to allow for spreading.
Bake for approximately 14-17 minutes in preheated oven, until the edges start to brown. Remove from oven and place baking sheet onto wire cooling rack, and allow cookies to sit on baking sheet for approximately ten minutes, then with a spatula, gently transfer cookies to a wire rack to continue cooling.