Wilton Cake Decorating demonstrates how to do a ruffle and a ruffle bow cake decorating techniques. Use a #104 petal tip to create this effect. Also use a medium icing consistency and hold the bag at a 45 degree angle. A petal tip can be used to make ribbons and bows. The icing tip has a narrow end and a larger end. Place the larger end down and move your hand up and down to create the ribbon. Make a figure eight to make the bow. Add a knot in the middle, if desired, and add strings. Star tips and round tips are also useful in making bows.