In small saucepan stir semisweet chocolate and butter over low heat until melted. Remove from heat. Stir in brandy and vanilla. Transfer to large mixing bowl. Add sugars and eggs; beat on medium until well-combined.
Combine flour, cocoa powder, baking powder, and 1/2 teaspoon salt. Add to chocolate-egg mixture. Beat on medium until well-combined. Stir in cherries and chopped chocolate. Spread batter in prepared pan.
Bake 30 minutes. Transfer to wire rack; cool completely. Gently cut in bars or sticks using a sharp knife. Makes about 48 bars.