From Alton Brown's "GOOD EATS":
2 sticks room temperature salted butter
1 cup sugar
1/2 cup brown sugar
1/4 cup milk
1 1/2 tsp. vanilla
2 1/4 cup flour
1/2 tsp. salt
1 tsp. baking soda + 1 pinch more
2 cups chocolate chips
-Beat butter, brown sugar and sugar together.
-In a separate little bowl mix together egg, milk and vanilla just until egg is broken up. Beat this in with the sugar mixture.
-In another bowl combine flour, salt and baking soda then beat in with the sugar mixture.
-Fold in your chocolate chips.
-Bake at 350 degrees for 8-9 minutes or until the edges of the cookies are light brown. Take them out of the oven and they will continue baking to be perfect.