After you're all done, use a 3-needle bind off from the wrong/under side (or knit the stitches together, depending on what you're doing).
Here's what it looks like on the right side. I drew an arrow where the seam is, otherwise you can't even tell (except maybe from the color change from red to green).
Now finish it off with a pom-pom and twist cords, and voila! I also crocheted around the ear flaps to even out the edges.
This method also works in the round in things like socks or bottom-up hats and sweaters, but can be a little tricky, and will be easier (possible?) to do, if you use a second circular to hold the hibernating stitches.
My modifications on the Tycus: I knit 5 sections instead of 6, and in the bottom of two of them I increased 3+3+2+1+1 stitches for the ear flap and then decreased the same symmetrically. The width of the ear flap is the same as one section, and the front is two sections and the back is one. And then I of course added the pom-pom and the cords. I cast on 40 stitches and the shortest short row was 24 stitches. In the ear flaps the middle rows end up being 34 stitches.