Final Exam Brownies

4 ounces unsweetened baking chocolate

1 cup butter -- cubed

2 cups sugar

4 eggs

1 cup flour

1 teaspoon vanilla

2 cups miniature marshmallows

1 cup chopped nuts

1 cup semisweet chocolate chips

1/2 cup m&Ms. plain chocolate candy

Melt together unsweetened chocolate and butter. Place in a bowl with sugar and mix. Beat in eggs. Add flour, vanilla, marshmallows, nuts, 1 cup chips . Pour into greased 9x13" pan. Sprinkle with 1/2 cup M&Ms (or more chips). Bake 350 degrees 40-45 minutes.