Ingredients:
2 tablespoons butter, melted
2 (1 ounce) squares unsweetened chocolate, melted and cooled
1/2 cup light corn syrup
3 cups confectioners' sugar, divided
3/4 cup powdered milk
1 teaspoon vanilla extract

Directions:
In a medium mixing bowl, stir together butter and chocolate. Beat in corn syrup, 2 cups of confectioner's sugar, powdered milk and vanilla. Dough will be stiff.
Sprinkle a work surface with the remaining 1 cup confectioners' sugar. Turn dough out onto work surface and knead until remaining sugar is incorporated. Shape into small logs and wrap in waxed paper.