You can find the detailed tutorial and pattern here:
http://www.theidearoom.net/2009/10/oven-hand-mitt-tutorial.html
How about now?
The first one (and clearly worst one) was in the left in both photos. As you can see, the fabric puckered quite a bit on the top side (the part where your hand goes) and I missed the bias tape a few times on the bottom side (the side that touches the pan).
I learned a few things that helped me do a little better job the second time around.
1. I cut the cotton batting and the Insulbrite slightly smaller than the fabric so that there wouldn't be so much bulk to sew the bias tape over. With the first one, I cut some of the bulk off, but the second time I was a little more successful with sewing close to the edge.
2. Instead of cutting 4 half ovals per potholder, I cut 2 pieces on the fold as was suggested in the comments on her blog.
3. I used the "proper" way to sew bias tape as demostrated here.
4. Instead of pinning the bias tape all the way through all that fabric when sewing, I just pinned it to the outer most layer. This made it MUCH easier to pin.
5. I overlapped the open end of the bias tape a little more than the first time before sewing.
Here is a two more pics of the first one:
And a couple more of the second one. You'll have to excuse the dirtiness, I used it prior to taking the photos.
And a photo of the first one "in use."
Happy Crafting!