Here is a link to an easy way to make two at one time.
http://prudentbaby.com/2011/04/prude...angle-trick-2/
Also I know there is a tutorial for making 4 at a time on You Tube. Take two squares right sides together, sew all around all four of the outer edges. Cut corner to corner and then the other corner to corner. At this point open them up and you have 4 - 1/2 square triangles. I saw this done by Jenny at Missouri Star Quilt Company on You Tube and it works but all four of the triangles are on the bias.