How to add Border to a raised button?

You can add Border to a raised button by adding a RoundedRecangleBorder as show in below example.

RaisedButton(onPressed: () {}, child: Text('Label Here', style: TextStyle(color: Colors.white),), 
color: Colors.transparent,
shape: RoundedRectangleBorder(side: BorderSide(color: Colors.white)),
),

Thanks, Srikanth