Trace cookie cutter for shape, work in negative space around shape after stitching tiny guideline of shape. Use a thread conditioner, Thread Heaven, on embroidery floss to prevent fraying; French knots or stab stitches used for effect.
The most feared and equally adored embroidery stitch. The trick is in really understanding how it works instead of just hoping it will turn out right. So why is it so difficult to learn? It's difficult to teach.