Here's what I did.
I put the polka dot around this set of potholders so they would all look alike.
On this batch, I did the envelope style turning as suggested by Nancy. Unfortunately, the last one I layered wrong so the backing fabric is wrong side out! Looks like I have one for me! When I make more this week, I'll simple add another to be made.
Do you ever make something then end up liking the back more than the pieced front? I really like the retro salt and pepper shakers that are on the back of the first set of potholders. :) I would probably use them with this side up.