Preheat oven to 350 °F.
Combine flour, salt, corn starch, and baking soda in a mixing bowl. Set aside.
Cream together on high speed, using the whisk attachment of a stand mixer, softened butter, vanilla, brown and white sugar.
Beat until batter is light and fluffy.
Add eggs slowly, one at a time until incorprated.
Gradually, on low speed, add flour mixture and mix until well combined.
Stir in white chocolate chips by hand using a rubber spatula.
Refrigerate dough for 1 hour.
Drop dough onto a silpat or parchment lined cookie sheet using a cookie scoop.
Top each cookie with a light sprinkle of salt.
Bake cookies for 9-11 minutes. Centers should still look soft and edges should be lightly browned.
Cool on baking sheet for 5 minutes then transfer to a wire rack to cool completely.