Place chocolate in a heatproof bowl. In a small saucepan bring whipping cream to a simmer. Pour cream over chocolate and let stand 5 minutes. Whisk together until smooth. Whisk in raspberry preserves. Cover and chill 2 hours or until firm enough to scoop.Advertisement
In a small bowl stir together cocoa powder and powdered sugar. Using a small scoop or measuring spoon, roll chocolate mixture in 1-inch balls. Roll in cocoa powder mixture to coat. Chill until ready to serve.