Does anyone do this successfully with a machine and have it look nice? Here's my method:
Opening the bias tape and sewing raw edges together with the right sides touching and then I flip it over and fold in the edge and topstitch it together. The problem is, it always leaves a funky looking stitch on the underside. It looks like a toddler sewed it, and it doesn't matter how hard I try to line them up, I either end up missing the bias tape or catching it somewhere in the middle.

I'm at the point where I'm thinking I need to stitch it by hand like a quilt binding, which I'm ok with, but it bothers me that I can't get a professional looking edge with my machine.
Does anyone have tips for this?

Thanks!