Making colored sugar for cotton candy is easy with natural food coloring powders. Mix the sugar and coloring into a bowl. Ensure the color is evenly distributed before placing the colored sugar into the cotton candy machine.
Place the floss sugar and food coloring powder in a large mixing bowl. Whisk the two dry ingredients together until the color is evenly distributed. This can take a couple of minutes.
Do not blend. Blending or using an electric whisk will turn the sugar into powdered sugar.
Once the color is evenly distributed, add 1 tbsp into the middle of the machine. Be sure to follow the machine's instructions for proper use.