The Eras CAL - Half-Treble Crochet (UK)/Half-Double Crochet (US)
The half-treble crochet starts life like the treble crochet, with a yarn over before you insert. But instead of doing 2 sets of yarn over and pull through 2, you pull through all 3 loops to complete the stitch.
1) Yarn over before you insert your hook.
2) Insert your hook into the stitch you are working. If you are working a first stitch into a chain, this will be the 3rd chain from hook.
3) Yarn over and pull up a loop. You will have 3 loops on your hook.
4) Yarn over, and pull through all of the loops on your hook. Make sure you are only pulling the working yarn through.
The final height of the half-treble sits between the double crochet and the treble crochet.