Chocolate Chip Cookies

What to do when there is random food laying around, for example like an egg yolk? LoL, needless to say, use it for the chocolate chip cookies recipe!
Chocolate Chip Cookies Recipe
(20 cookies)
2cups all purpose flour
1/2tsp salt
1/2tsp baking soda
3/4cup butter, melted
3/4cup packed brown sugar
1/2cup white sugar
1egg
1egg yolk
1tsp vanilla
1cup semi-sweet chocolate chips (more or less as you desire, I used only 1/2cup)
1) whisk together flour, salt and baking soda in a bowl and set aside. In another bowl, whisk together melted butter, both sugars, eggs and vanilla until well combined. Add the flour mixture to the wet, combine the two with a wooden spoon and add in chocolate chips at the same time.
2) preheat oven to 325F, line a baking tray with parchment paper. Place dough on to the paper with margin in between. Bake them for 15-17mins.