I found this recipe on http://www.allrecipes.com/ (my favorite recipe site) and tried making them a couple of days ago...and they turned out soooooo yummy!! I think this is now my favorite chocolate chip cookies recipe. I doubled the recipe..and still they were gone within a couple of hours of making them. I will definitely try these again!

Best Big, Fat, Chewy Chocolate Chip Cookies

2 cups all-purpose flour
1/2 teaspoon baking soda
1/2 teaspoon salt
3/4 cup unsalted butter, melted
1 cup packed brown sugar
1/2 cup white sugar
1 tablespoon vanilla extract
1 egg
1 egg yolk
2 cups semisweet chocolate chips

DIRECTIONS
Preheat the oven to 325 degrees F (165 degrees C). Grease cookie sheets or line with parchment paper.
Sift together the flour, baking soda and salt; set aside.
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. Stir 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.
Bake for 15 to 17 minutes in the preheated oven, or until the edges are lightly toasted. Cool on baking sheets for a few minutes before transferring to wire racks to cool completely.