plant-based food colouring I love the plant-based food colouring from Whole Foods or use any other natural, dye-free food colouring
Instructions
Mix together the powdered sugar and water until fully combined into a medium consistency.
Divide the icing into individual bowls for colouring. I made a rainbow of colours, so I separated mine into 7 containers. Add food colouring to each bowl, bearing in mind that dye-free food colouring is less concentrated and may require a few extra drops to achieve a vibrant color. Be careful not too add too much or the sprinkles will taste like food colouring.
To make secondary colors: mix two primary colors (red, yellow or blue) together.To make orange: mix red and yellow.To make green: most packs come with green, but I find the colouring tends to be neon, adjust the colour by adding a bit more blue to darken/normalise it slightly, or mix yellow and blue to make your own green colouring.To make purple/violet: mix red and blue.
To make tertiary colors: mix a primary and secondary color together. For example, to make indigo: mix red and blue, then add a bit more blue to the mix.
To adjust colouring: lighten a colour by adding a touch of white icing or darken a colour by adding a very small amount of black (do this carefully—you truly only need a very small amount)
Separate the icing into piping bags. To make it easier to fill a bag, place it into a tall drinking glass and fold the top over the glass. This will open and stabilize the bag so that you can pour in the icing. Squeeze the icing into the bottom as much as possible, pressing any air out.
Twist your bags or use rubber bands to keep the icing down. Snip off a small, evenly-sized tip from each bag.
Squeeze lines of icing onto a piece of parchment paper. You can also pipe other shapes, like dots, hearts, or even little animals if you'd like! If you make a mistake initially, just wipe them off and start over!
Let the sprinkles set on the parchment paper for 12 hours. If you're in a rush, they will be dry enough to use in 1 hour, but anything you plan to store will need to set for the full 12 hours. Cut them up (if needed) and slide them off into an air-tight container; completely dry sprinkles will slide off very easily.
Store sprinkles in a cool, dark, and dry location. They will keep for up to a year if stored properly. Enjoy!
Video
Notes
Humidity can ruin the sprinkles' texture and cause them to clump together. Ensure that the sprinkles are fully dry before transferring them to an airtight storage container and store them in a cool, dark, and dry place. When properly stored, they’ll last up to a year.