En el ViewController:

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    // instance cell
    var cell = tableView.dequeueReusableCellWithIdentifier("BenefitNoteCell", forIndexPath: indexPath) as UITableViewCell

    // card
    var whiteRoundedCornerView:UIView!
    whiteRoundedCornerView=UIView(frame: CGRectMake(5,10,self.view.bounds.width-10,155))
    whiteRoundedCornerView.backgroundColor = UIColor.whiteColor()
    whiteRoundedCornerView.layer.masksToBounds=false

    whiteRoundedCornerView.layer.shadowOpacity = 0;
    whiteRoundedCornerView.layer.shadowOffset = CGSizeMake(0, 1);
    whiteRoundedCornerView.layer.shadowColor=UIColor.grayColor().CGColor

    whiteRoundedCornerView.layer.cornerRadius=3.0
    whiteRoundedCornerView.layer.shadowOffset=CGSizeMake(0, 1)
    whiteRoundedCornerView.layer.shadowOpacity=0.5
    cell!.contentView.addSubview(whiteRoundedCornerView)
    cell!.contentView.sendSubviewToBack(whiteRoundedCornerView)

    return cell!
}

Notese que el valor 155 es el alto de la celda.