The rosette has the tight, swirling look of a rose, but is achieved in one continuous rotation, rather than with wrapped layers of petals. Rosettes make wonderful borders and single rosettes are also used as candleholders on top of a cake.
Fit the decorating bag with tip 16 and fill 1/2 full with medium consistency icing. Hold the bag and tip at 90° angle slightly above the surface of your cake.
Squeeze out icing to form a star.
Without releasing pressure, raise tip slightly as you drop a line of icing on the top of the star in a complete rotation, starting at 9:00 (right-handed) or 3:00 (left-handed), moving to 12:00, then to 3:00 (right-handed) or 9:00 (left-handed) and 6:00.
Stop pressure and continue to move the tip back to 9:00 (right-handed) or 3:00 (left-handed) to complete the rotation.
Lift tip away.
To make the rosette border, simply make a line of uniform rosettes, touching on another.