Grease an 8x8x2-inch baking pan;set aside;Heat oven to 350 degrees.
In a medium saucepan, combine the 1/3 cup butter, sugar and water; cook and stir over medium heat just until boiling, remove from heat, add the 1 cup of chocolate pieces; stir until chocolate is melted.
Stir in eggs and vanilla, beating lightly with a spoon until combined; stir in flour, baking soda and salt; stir in pecans.
Spread batter into prepared pan;Bake at 350 degrees about 20 minutes or until edges are set and begin to pull away from the sides of pan.
Using a fork, prick the warm brownies several times, Drizzle BOURBON evenly over brownies; cool in pan on wire rack.
For frosting; In a small mixing bowl beat the 3 tablespoons butter with an electric mixer on medium to high speed for about 30 seconds; gradually add powdered sugar, beating well, slowly beat in 2 teaspoons of the milk and the vanilla; if necessary, beat in remaining milk to reach spreading consistency, spread over brownies;Melt chocolate; drizzle melted chocolate over frosting.