Add the powdered sugar and cream of tartar into your mixing bowl. Stir to mix.
Using a whisk attachment, turn your mixer on to low speed and slowly add in the liquid egg whites.
Once combined, turn the speed to medium and whisk for 1 – 2 minutes until the icing forms soft peaks.
Add in 1 teaspoon of warm water and flavored extract (optional) and mix until combined.
Distribute the icing between bowls, designating one bowl per the desired color.
Add in 1 – 2 drops of food coloring to each bowl. Then, mix with a spoon. If you’re following along with the napkin print, you’ll need yellow, pink, peach, light blue, teal, and red.
Set a piece of parchment on a baking sheet or a level work surface. Use food-safe brushes to add brush strokes of each icing color onto your parchment.
Set aside to dry overnight.
For the gold pieces, wait until the icing candies are completely dry. Then, brush a handful of them with gold cake paint or luster dust.