Black Walnut Fudge

3 cups granulated sugar
2/3 cup evaporated milk
3/4 cup margarine
1/2 teaspoon black walnut extract
1 1/2 cups Marshmallow Cr?me
1/2 cup walnuts
12 ounces chocolate chips

Heat sugar, evaporated milk and margarine to boil and cook over medium heat to 238 degrees F.

Beat in chocolate chips, Marshmallow Cr?me, walnuts and black walnut extract. Pour into a greased 13 x 9-inch dish.