Three-Chocolate Fudge

3 1/3 cups sugar
1 cup butter or margarine
1 cup packed dark brown sugar
1 can (12 ounces) evaporated milk
32 large marshmallows, halved
2 cups (12 ounces) semisweet chocolate chips
2 milk chocolate candy bars (7 ounces each), broken
2 squares (1 ounce each) semisweet baking chocolate, chopped
1 teaspoon vanilla extract
2 cups chopped pecans

In a large saucepan, combine first four ingredients. Cook and stir over medium heat until sugar is dissolved. Bring to a rapid boil; boil for 5 minutes, stirring constantly.

Remove from the heat; stir in marshmallows until melted. Add chocolate bars and baking chocolate; stir until melted.

Fold in vanilla and pecans; mix well. Pour into a greased 15x10x1-inch baking pan. Chill until firm. Cut into squares.

Yield: 5 1/2 pounds
Source: Taste of Home