Rocky Road Fudge Brownies

1 (19.8 ounce) package brownie mix
1 cup chopped pecans
3 cups miniature marshmallows
2 (1 ounce) squares unsweetened chocolate
1/3 cup milk
1/2 cup butter or margarine
1 (16 ounce) package confectioners' sugar, sifted
1/2 teaspoon vanilla extract

Prepare brownie mix according to package directions; stir in pecans. Spoon batter into a greased 13 x 9-inch baking pan. Bake at 350 degrees F for 25 minutes. Remove from oven and sprinkle miniature marshmallows over hot brownies.

Combine chocolate, milk and butter in a heavy saucepan. Cook over low heat until chocolate and butter melt, stirring often. Remove from heat. Transfer to a medium mixing bowl. Add confectioners