When I was making this blanket, I wanted it to look like the ones you can buy from stores.

  I wanted the binding to be large and out from the edge of blanket (so it’s just two layers of satin instead of two layers of satin and ultra cuddle fabric) so my blanket could be bigger.  yet again, I bought a remnant and the piece wasn’t quite as big as I wanted when I got down to making the blanket.

But I couldn’t figure out how to get that nice sewn mitered corner on both sides of the blanket when it was far out from the blanket.  And I couldn’t find any good tutorials with pictures on how to do it.  So I took pictures as I did mine.
Since making my baby doll quilt, I think the tutorial I used to bind that quilt may have worked for this too, but I didn’t find that until after I had put all the effort into my own way.
 So first I cut out long strips of satin 3 inches wide, ironed them in half, and ironed up on edge 1/2 inch.  With the brown one I ironed with right sides together thinking my satin might catch on the iron, but those creased never came out even after washing.  So with the white one I ironed wrong sides of the satin together.  I used my seam gauge tool to help me iron up more exactly.
I sewed the side that I didn’t iron along one side of my blanket.  I tried very hard not to stretch the cuddle fabric as I pinned and I had the cuddle fabric on the top.  There should be extra fabric at both edges of the blanket and when you get all four sides sewn on there will be lots of extra fabric at the edges.
But this is what one edge looks like.  oh yeah.  at each corner of the cuddle fabric, you should stop sewing 1/2 inch before the corner.
Sandwich the cuddle fabric by folding the satin along the iron lines and pin it down.  Feel carefully to make sure the fold of the satin where you are going to sew is just a little bit past the seam on the other side.  That way you can machine sew the binding on this side down without creating a seam on the other side.  The stitches mostly get lost in the luxurious cuddle fabric.
Don’t sew all the way to the end of the blanket.  Leave and inch or two to give you room to make your mitered corners.  When you have a two pieces of satin meeting up at a corner, turn the satin so right sides are facing each other and pin it.  It will be a bit awkward since the satin is sewn to the cuddle fabric.
Now see how the brown fabric has that white cuddle fabric peeking out behind it?  you want to sew the two pieces of brown together right from where the seams that attach it to the cuddle fabric end in a diagonal up to the center crease of the brown fabric.
Then you want to turn and come back in a diagonal on the other side, ending at the crease of the seam allowance.  You could iron those diagonals in for easier sewing, but I didn’t.
 
After trimming and clipping, it makes an arrow type shape.  And if you were to bring the point of the arrow down until a straight line formed from the beginning of the seam to the end of the diagonal seam, the point should still be on the crease.  Didn’t think to take a picture of that.  I eye-balled it.
 
Turn the corner right side out and it should form a nice mitered corner and all you need to do is finished sewing the binding at the corner.
So, the satin is going to slide on the cuddle fabric a bit and the cuddle fabric will probably stretch a bit.  You could try using a walking foot.  I don’t have one so it wasn’t an option.  If you don’t have one, pin a lot and sew in opposite directions.  What that means is if I did the first seam down the blanket going from corner A to corner B, when I sandwich the cuddle fabric and am ready to do the second seam on top (closing the binding), I should sew from corner B to corner A.  It helped my binding stay flatter instead of creating a slight twist in the satin.