Step 1

Preheat the oven to 325°F (165°C). Grease cookie sheets or line with parchment paper.

Step 2

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.

Step 3

Beat in the vanilla, egg, and egg yolk until light and creamy. Mix in the sifted ingredients until just blended.

Step 4

Stir in the chocolate chips by hand using a wooden spoon. Drop cookie dough 1/4 cup at a time (for giant cookies) or a tablespoon at a time (for smaller cookies) onto the prepared cookie sheets. Cookies should be about 3 inches apart.

Step 5

Bake larger cookies for 15 to 17 minutes, or 10 to 12 minutes for smaller ones (check your cookies before they’re done; depending on your scoop size, your baking time will vary) 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.