The easiest way to add a ruffled binding is to sew quilt top and backing right sides together with the ruffle sandwiched between the top and backing. You need to leave a small opening to turn the quilt right-side out. Then, a simple topstitch can be use to close the opening and finish the quilt. In these types of quilts, they cannot be quilted together due to the quilt needing to be turned. You could add simple ties to keep the layers together.
Heather Bailey's Freshcut quilt looks to be a different method because the instructions include quilting the layers together before the ruffle layers are added. Here's a link that may help:
http://www.mccallsquilting.com/articles/prairie_points_edging.
It's for a prairie point edge, but adding a ruffle would be accomplished the same way.
Here's how I think it's done:
- Quilt your layers together, but leave the outer 1" edge of your quilt free from any quilting.
- Trim all layers even with quilt top.
- Fold only your quilt top right-sides together towards the center of quilt and pin.
- With right sides together, sew ruffle on top of quilt back and batting.
- Iron ruffle up away from backing and press seam allowance down towards inside of quilt.
- Remove pins from your quilt top and unfold. Now fold the quilt top
under 1/4" all the way around to hide raw edge. Press.
- Top stitch all around the quilt sewing through all layers. You could use a decorative stitch here to add more detail.
Hope this helps. Good luck!