Put melted butter and sugars into mixing bowl. Beat until creamed together.
Add eggs, yolk, mix, add vanilla mix to combine .
Add salt and baking soda to 2 cups flour in a separate bowl or on a sheet of parchment, stir to incorporate. Slowly add flour to mixing bowl, to blend. Check the consistency, if too soft add the remaining 1/4 cup of flour, mixing to combine. Add chips and stir in.
This is a soft cookie dough. Cover bowl and refrigerate for at least 30 minutes. This will prevent too much spread when baked.
Preheat oven to 375 degrees. Line baking pans with parchment paper. Portion cookies, bake 12-14 minutes. Enjoy!