Step 1

Preheat oven to 350°F. Place 6 oz. chocolate and the butter in large microwaveable bowl. Microwave on HIGH 2 min. or until butter is melted. Stir until chocolate is completely melted. Add sugar; mix well. Blend in eggs and vanilla. Stir in flour and pecans until well blended.

Step 2

Spread into greased 8- or 9-inch square baking pan.

Step 3

Bake 22 to 25 min. or until toothpick inserted in center comes out with fudgy crumbs. (Do not overbake.) Cool in pan on wire rack. Melt remaining 2 oz. chocolate as directed on package. Drizzle over dessert; let stand until firm. Cut into 16 squares to serve.