3/4 cup butter or margarine
6 ounces unsweetened chocolate
4 eggs
4 teaspoons orange-flavored liqueur
1 teaspoon vanilla extract
2 cups granulated sugar
1 cup flour

Preheat oven to 350 degrees F. Lightly grease 13 x 9-inch pan.

In saucepan over low heat, melt butter and chocolate. Cool.

In large bowl, beat eggs, orange liqueur and vanilla extract until thick and lemon-colored. Gradually add sugar, beating until fluffy. Add chocolate mixture; blend well. Fold in flour. Spread in prepared pan. Bake 25 to 35 minutes or until brownies begin to pull away from sides of pan. Cool.

Frosting
1/2 cup butter or margarine
2 cups confectioners' sugar
1/8 teaspoon salt
3 tablespoons orange flavored liqueur
1/2 teaspoon vanilla extract

In small bowl, beat butter until fluffy. Add remaining ingredients; beat until smooth and creamy. Spread over cooled brownies. Drizzle melted chocolate over frosting. Refrigerate until firm.