Combine condensed milk, chocolate chips and butter in a heavy saucepan. Cook
over medium-low heat, stirring constantly, until chocolate and butter melt.
Remove from heat.
Stir in flour, chopped pecans, and vanilla. Drop by teaspoonfuls onto ungreased
cookie sheets. Press a pecan half into the center of each cookie (optional.)
Bake at 350º F. for 7 minutes. (Do not over bake.) Transfer cookies to wire
racks to cool.
