Heat oven to 350°F. In small saucepan, melt 1 cup chocolate chips over low heat; cool. In medium bowl, combine flour, baking powder, baking soda and salt; mix well. In large bowl, beat margarine and sugar with electric mixer until creamy. Blend in melted chocolate, egg and vanilla. Gradually add flour mixture; mix well. Stir in oats and remaining 1 cup chocolate morsels. Drop by rounded tablespoonfuls onto ungreased cookie sheet. Bake 12 to 14 minutes or until set. Cool 2 minutes on cookie sheet; remove to wire rack. Store tightly covered.