Texas Longhorn Touchdown Brownies

1 1/4 c Butter or margarine
3/4 c Unsweetened cocoa
2 c Sugar
6 lg Eggs
1 tb Vanilla
2 c All-purpose flour
2 c Pecan halves
3/4 lb Semisweet chocolate; cut in 1/2" chunks In a 3-4 quart pan over low heat, stir butter with cocoa until melted. Off the heat, beat in sugar.
Add eggs and vanilla; beat well.
Add flour, pecans, and chocolate; mix well. Spread batter in buttered 9x13" pan. Bake in a 325 degree oven until top feels dry in center, about 35 minutes. Cool in pan. If baking ahead, wrap airtight when cool and hold up to a day. Cut into 12 to 16 pieces.