Coconut-Potato Fudge

3 medium-size potatoes, peeled
4 tablespoons melted butter
1/2 pound shredded coconut
2 pounds confectioners' sugar
2 teaspoons vanilla extract
4 (1 ounce) squares sweet chocolate, melted

Cook potatoes until soft and rub through sieve or ricer. Add melted butter and confectioners' sugar. Mix together well and then add coconut and vanilla extract. Beat until creamy. Pour into a flat, buttered tin.

When set, pour the chocolate over it. Let stand 2 hours.

Cut into squares.