To make a snowflake out of icing, fill a plastic bag with royal icing and snip one the corner. Squeeze icing out of the hole to pipe a snowflake design on top of your base royal icing layer. First pipe a "plus" symbol (+), then make an x shape that crosses the center of the + to form a starburst design. From there, you can add small dots or v shapes to the tips of the lines (like an arrow). You must use a thicker consistency (15-20 seconds on the time-to-settle test) for the designs to stay intact.