Kelly told April and April told me about these. These cook up big and fluffy - which is my kind of cookie. The original is from Allrecipes.com
2 cups all-purpose flour
1/2 tsp. baking soda
1/2 tsp. salt
3/4 cups unsalted butter, melted
1 cup packed brown sugar
1/2 cup white sugar
1 tablespoon vanilla extract
1 egg yolk
2 cups semi-sweet chocolate chips
Preheat the oven to 325 and line a baking sheet with parchment paper (definitely do this).
Sift together the flour, baking soda, and salt; set aside.
In a medium mixing bowl, cream together melted butter, brown sugar, and white sugar until 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.
Drop cookie dough 1/4 cup at a time onto the parchment lined sheet 3 inches apart. Bake 15-17 minutes or until edges are lightly toasted. Makes 18 cookies.