Brazil Nut Fudge

4 (1 ounce) squares chocolate
2 tablespoons butter
1/4 teaspoon salt
1 teaspoon vanilla extract
1 pound sifted confectioners' sugar
1/3 cup milk
1 cup chopped Brazil nuts
Whole Brazil nuts

Melt chocolate and butter over hot water. Stir in salt and vanilla extract. Stir in sugar alternately with the milk, keeping pan over hot water.

Remove from heat and stir in Brazil nuts. Pour fudge into a 7-inch square pan. Garnish with Brazil nuts, cut in half. Let stand several hours. Cut into squares.