Soak raisins in brandy.
Melt butter and chocolate in a bowl 1 minute, 30 seconds, on high, uncovered.
Stir in eggs and sugar.
Sift in baking powder and flour.
Add raisins, salt and nuts and stir well.
Spread cookie mixture in a rectangular (10 x 6-inches) baking dish.
Microwave, covered, 5 minutes on high.
Slice into pieces of desired size when cool.