1. Gather your ingredients
2. Preheat the oven to 350 degrees F (175 degrees C).
3. In a medium bowl, cream together the melted butter, brown sugar and white sugar until well blended.
Beat in the vanilla, egg, and egg yolk until light and creamy. Mix in the sifted ingredients until just blended.
in the chocolate chips by hand using a wooden spoon. Drop cookie dough 1/4 cup at a time onto the prepared cookie sheets.
Cookies should be about 3 inches apart.