A quick explanation:
In short, we'll be using a taller stitch to move the corner of the square over. This allows the material to shift over, avoiding the twist of the granny.
Material and gauge:
You can use this method with any yarn weight, any size square, and any hook you like. I'm working with scraps of Red Heart Super Saver and a skein of Caron One Pound, using a size J/10 - 6.00mm hook.
I'm working my squares using the classic "3 double crochet, chain 1" pattern. The "special" stitch I'm using is the extended double crochet. If you're not comfortable working the extended stitch, you can replace the usual double crochet stitches with half double crochet stitches, and make a double crochet where I'm making extended double crochet.
To begin rounds, I only chain 1 before making the first double crochet.
I really recommend you watch the video! I explain more about working large squares and you can see a mistake/the fix I tried to make on a bigger square that has some problems. It may help if you happen to miss a stitch and find your granny twisting again. (The big square will give this secret project away for sure; sorry I can't show you here!)
How to do it:
In the first round, the granny stitch is changed to (1 chain, 2 double crochet, 1 extended double crochet).
To make the extended double crochet:
Yarn over, inset the hook; yarn over and pull up a loop. Yarn over, pull through one loop. (Yarn over, pull through 2 loops) 2x.
To complete the rest of the round: (1 chain, 2 double crochet, 1 extended double crochet) 3x.
*Optional* You can still use this method with any way you like to work granny squares. However, I really recommend giving this join a try - It also helps to combat the granny twist, but it's not enough on its own.
Do not chain 1 before joining. Instead, join with a half-double crochet stitch in the beginning double crochet.
For remaining rounds:
The first round is the only time you will use the extended stitch at the end of the granny stitch. In all following rounds, the round will begin with the usual (1 chain, 3 double crochet). For the last set of stitches on each side (or the first set of stitches worked into each corner), replace all 3 double crochet with extended stitches.
At first, it may look like your square is starting to twist in the opposite direction. Oh no! But don't worry; a little stretch into shape will work it out.
Just replace the last set of every side with a taller stitch, and say goodbye to the notorious twisting granny.
You can get extra tips in the video.