When I first wrote about these, I wasn't totally happy with the result. Since then, I have improved the design, producing a second pair with better-fitting heels.
These were much better heels. Still, I've improved the design even more since then. The pattern includes two different methods of knitting double-thick heels: a simple one for those that don't want to fuss with two strands of yarn and a standard two-strand approach that offers the opportunity to add a design to the heel flap. I've improved the leaf and added more designs. I no longer offer support on this pattern. If you would like a free copy, click this link: download Double Heeled Socks
or click this link to go the the Ravelry Pattern Page: Double Heeled Socks