Maimie Eisenhower's Fudge

4 1/2 cups sugar

2 tablespoons butter or margarine

Dash salt

1 (13-ounce) can evaporated milk

1 (12-ounce) package semisweet chocolate pieces

3 (4-ounce) packages sweet cooking chocolate, broken

2 cups marshmallow cream

2 cups chopped walnuts or pecans

Combine sugar, butter, salt and milk in large saucepan. Bring to boil over medium heat, stirring constantly. Boil 6 minutes, stirring occasionally. Combine chocolates, marshmallow cream and nuts in mixing bowl. Pour milk mixture over chocolate and beat until chocolate is melted.

Turn into well-greased 13x9-inch pan. Cool several hours or until firm. Cut into squares and store in airtight container. Makes about 5 pounds.