I saw this cool casserole carrier in an issue of Crafts 'n Things. There is a piece of cotton batting sandwhiched between the two layers of fabric so it acts like a hot pad too. First you create 2 rectangles...cotton batting between the outer fabric and the lining. Next, you lay one piece over the other to form a cross. Stitch along the 4 borders where they meet. Add some ribbon to form a casing. Slip wooden dowels through the ribbon to create handles. Add velcro to the other two ends and done. Very simple and very handy.
This picture shows the carrier after construction...all laid out, lining side up.
Next, place your 9 x 13 inch casserole dish in the center (preferably with food in it).
Then bring the velcro ends up to meet each other and fasten. One piece of velcro is attached to the lining side and the other to the outer side.
The wooden dowels are easily removed so that the casserole carrier can be washed.