Would you give a little crash course in 'turning' the potholders, please?[/quote]
I trimmed the top, backing, one layer of Insulbrite (insulated batting, from Joann's), and one layer of 100% cotton (Warm and Natural) so they were all the same size, say 7" square. Make the sandwich:
insulbrite
cotton batting
backing, right side up
top, wrong side up.
If you want a loop for hanging, make it and insert between the backing and top, at one corner. It will get caught in the edge seam.
Sew around the edges, maybe 1/4" seams (or a little bigger), leaving about 4" open so you can turn it. I went a tiny bit diagonal across the corners, which worked out well (and it made the loop very tidy).
Trim the seams to 1/4" if needed. Turn right side out, hand sew the opening, and then do some quilting/top stitching as desired. I top-stitched about 1/2" from the edge, but you might do as little as 1/8".