A step-by-step tutorial on decreasing the brioche stitch: Instructions for the left- and right-leaning version.
In my previous two posts, I talked about increasing the Brioche stitch, and you’ll also find a very detailed post about knitting this versatile stitch pattern. But it probably goes without saying that for shaping a garment, that isn’t enough. So, I’m sure you are already wondering how to decrease the brioche stitch, right?
After all, it’s only when combining increases with decreases that you can achieve these elaborate cabled patterns, the Brioche stitch is so famous for. You might have already tried a k2tog or an SSK, but that most likely didn’t get you very far.

And here’s why. I said it before, and I say it again: You are knitting double. But through some ingenious trick (the slipping with yarn in front), you don’t need two needles and get away with knitting it on one needle (watch the video to really understand what I mean). As a result, you need to decrease the front and the back ribs at the same time to make it work.
Unlike the standard increases, the Brioche decreases have a lean. So, I’ll show you a left- and right-leaning version first, and then we’ll have to look at the centered decrease.
So, let’s dive right into it, eh?
Note: Be aware that these decreases also work for the half-brioche stitch.
Instructions for the right-leaning brioche decrease
I'll start with the step-by-step instructions on how to knit the right-slanting decrease first. You'll find tons of different abbreviations for it. I've seen bk3tog (brioche knit 3 together) or brRsl dec (brioche right slanting decrease), to name just a few. I personally feel that Brioche k2tog might actually be the most appealing term.
Not because it describes how you are knitting it. Instead, it describes what you are trying to achieve here. You want to decrease two ribs (i.e. knit stitches) in a way the left one comes out on top, just like when you knit two together.
Instructions
- Step: For a right-leaning brioche decrease, start by knitting up to a double-stitch (a yarnover with a slipped knit stitch; often also called a brioche knit) and slip this double stitch knitwise (make sure you don't accidentally drop the yarn over).

- Step: Knit the next stitch.

- Step: Pass the slipped double stitch over the one you just knit.

- Step: Slip the resulting stitch back to the left needle purlwise.

- Step: Now pass the double stitch on the left over the first stitch.

- Step: Slip the remaining stitch to your right needle purlwise.

Notes
I know, the passing over might feel a bit unusual at first. Do remember, however, that knitting one stitch and passing the next stitch over will give you exactly the same result as a k2tog.
Think of it as pulling a loop through two rings. Instead, you can just pull the loop through one ring and then throw the second ring over the loop afterward. But once you have three (like in this case) or even four loops, the passing gets much easier than going through all stitches at the same time.
Also, these instructions are exactly the same - no matter if you are knitting the brioche stitch in one color, two colors or in the round.
Left-Leaning Brioche Decrease
And here’s how you need to adjust this for a left-leaning decrease. You’ll find brLsl dec (brioche left-slanting decrease) or bsk2p (brioche slip knit 2 pass) in some patterns. Or simply call it Brioche SSK because that’s essentially what it boils down to.
Step 1: Slip the first double stitch (brioche knit) consisting of a yarn over and a slipped stitch as if to knit.

Step 2: Knit the next stitch (appears like a purl stitch) and the following double stitch (so 3 stitches in total) together. So, more or less a regular k3tog.

Step 3: Now pass the double-stitch you slipped in step one over the three stitches you knit together.

And you are done already and will have your left-slanting brioche decrease on your right needle.

Note: Unlike with the brioche increases, there is no special way you need to handle the decrease on the return row. They will both result in a single knit stitch that you can yarnover slip1 following your standard repeat.
Brioche centered double decrease / br4stdec

You can also decrease a brioche stitch in a way so it appears three ridges converge into one. This decrease is sometimes also called br4st dec. That’s because you are reducing your repeat by 4 brioche stitches. Again, I feel this is a bit of weird terminology that’s bound to confuse beginners.
Still, this is a very complicated decrease because, counting the yarn overs, there are altogether 8 stitches involved. And for the standard method, you even need a cable needle to make it work.
As it’s a bit more difficult to knit it, I wrote a separate tutorial on how to br4st dec here.
This standard way to work a brioche double decrease isn’t fully reversible, though. That’s why I unvented my own version that looks exactly the same on both sides.
The true magic will happen when you combine the increases with the decreases a couple of rows later. That way, you maintain the same stitch count (= width of your project), but you will be able to add intricate cable structures. Just like a Celtic knot or similar very advanced cable patterns.
Always. That’s how to decrease the brioche stitch. Feel free to ask your questions in the comments below

Fabulous! Thank you!
Your tutorials are really fantastic. I am an experienced knitter, but I had never tried brioche stitch before. A friend gave me a pattern to knit with increases and decreases. After I figured out the basic brioche, your tutorials and clear explanation really made the difference for me. Thank you so much.
Thank you Norman. You are great! Question for you… most brLsl or brRsl decreases have you keep yarn in front but it looks like you keep the yarn behind. Does it matter? Not sure what process to follow. Thanks!
I am not sure I can follow. Are you sure this is not just the difference between english and continental knitting you are mistaking for the actual yarn position for the stitch?
Thanks for great instructions. Regarding decreasing during brioche I once tried doing it on the background color side (pearl side) by just mirroring the standard way on the front color side (knit side), with poor result How should this be done in a proper way?
Best regards
Peter
well, it works like double purl deceases. So, you you have to mirror EVERYTHING and that it does work. but probably easier to understand if I did a video. but i don’t have a time to do that right now.