One Bowl Brownies!

Ingredients
4 (1 ounce) squares unsweetened chocolate
3/4 cup butter
2 cups white sugar
3 eggs
1 teaspoon vanilla extract
1 cup all-purpose flour
1 cup chopped walnuts (optional)
Directions
1.Preheat oven to 350 degrees F (180 degrees C).
2.Microwave chocolate and butter or margarine in large bowl at HIGH for 2 minutes or until butter or margarine is melted.
3.Stir until chocolate is melted. Stir in sugar. Mix in eggs and vanilla. Stir in flour and nuts.
4.Spread in greased 13 x 9 inch pan. Bake for 35 minutes (do not over bake).