In medium bowl, combine flour, baking soda and salt. In large bowl, beat butter and sugar until well blended. Beat in egg and vanilla. Blend in melted chocolate; mix well. Add flour mixture to butter mixture, mixing until incorporated. Stir in chocolate chips. Drop by mounded tablespoonfuls about 2-inches apart onto ungreased cookie pan.
Bake 10-12 minutes or until edges are set (centers will be soft). Cool 1 minute; remove from cookie pan to cooling grid.