Pre heat oven to 330 Fahrenheit
Add the melted butter, sugars, egg and egg yolk to a glass bowl
¾ cup Butter, 1 cup Brown sugar, ½ cup White sugar, 1 Egg, 1 Egg yolk
Mix with a whisk until well combined, about 3 minutes
Add half the flour, baking soda and salt, mix with a spatula
1 ¾ cups All purpose flour, ½ teaspoon Baking soda, ½ teaspoon Salt
Add the chocolate chips and the rest of the flour and fold in until the dough is formed
1 cup Semisweet chocolate chips
Scoop out with a cookie or ice cream scooper. Bake on a cookie sheet at 330 Farenheit for 13 minutes
Remove from the oven and allow them to cool down for a couple of minutes in the cookie sheet (they will finish baking)