Mixing purple icing requires patience.
Different occasions may call for purple icing. You might be called upon to prepare a cake for a particularly enthusiastic fan of Barney or Teletubbies' Tinky-Winky. You might be looking to create a scene from a Disney or Pixar movie that requires purple details, such as night sky, or window or door trim. Or you might be re-creating objects or settings from an online fantasy game, such as Dream Chronicles. In any case, mixing purple icing takes patience and a willingness to experiment.
Instructions
Fondant
1. Transfer a cup of so of icing to a small bowl or to a food processor with a plastic blade.
2. Add one drop of blue liquid food coloring -- or a toothpick dab of gel or paste -- to the cup of icing. Put on your gloves and work the food coloring into the fondant with your hands or use the food processor to do the same job.
3. Add one drop, or toothpick dab, of red coloring and mix well.
4. Add more blue and/or red food coloring until you achieve a deeper purple color than you want.
5. Mix the colored frosting into the untinted frosting to achieve the shade you desire.
Other Icing Types
6. Start the process 24 hours before you need the icing, as icing tints may deepen or shift over time.
7. Add one drop of blue liquid food coloring -- or a toothpick dab of gel or paste -- to the frosting. Mix well with a spoon or spatula.
8. Add one drop, or toothpick dab, of red coloring to the bowl and mix well.
9. Add more blue and/or red food coloring until you achieve the purple color you want.
10. Store in a cool place overnight, then adjust the color as needed before frosting the cake the next day.
