In US crochet terms it's called the treble crochet or triple crochet stitch, abbreviated trc, or just tr. In the UK it's called the double treble, abbreviated dtr or dbl tr. No matter what you call it, it's a natural progression from the double crochet stitch.
How to Crochet the Treble Crochet Stitch: Right Handed Version
How to Crochet the Treble Crochet Stitch: Left Handed Version
In other words, to make a treble crochet stitch, wrap the yarn around the hook twice before inserting it in the next stitch. Then, insert the hook in the stitch, yarn over and pull up a loop through the stitch. At this point there are 4 loops/wraps on the hook.Yarn over and pull through 2 loops (3 loops remaining on hook), yarn over and pull through another 2 loops (2 loops remaining), and yarn over and pull through the last 2 loops on hook (1 working loop left on hook). An easy way to remember how to make a treble or triple crochet is to think that you start the stitch with 3 loops or wraps on the hook and then pull through 2 loops 3 times. Treble = triple = three!
If you are making rows of treble crochet, you will likely either start with a ch 4 which will count as your first stitch, or with a ch 3, which will not probably count as a stitch - but there are always exceptions, so read your patterns carefully. You will see trc a lot in afghan square patterns, where it often helps square up the corners of patterns that started off round, and in cable crochet, where it's length is used to create waves and lines that dance across the fabric.
Patterns here at moogly that use the trc include the Diamond Crochet Cowl and Riley Flower Square Motif, as well as the Cable Heart Gift Bag. I hope this video has helped you understand this stitch a bit better! It takes some practice to keep it even, but it's a great stitch to know and very handy indeed. Are there any stitches that are giving you trouble, or that you'd like to see in a moogly video? Let me know in the comments!
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