Make the syrups by mixing all the ingredients together, starting with the lower amounts of sweetener and vitamin C powder. Please note that you'll want to make the syrups very flavor dense (i.e. a lot sweeter!), so that they actually flavor your shaved ice!
Make shaved ice by running ice cubes in a blender, food processor or bullet. Transfer to serving glasses right away, pour in the syrups and enjoy!
And if you've got an ice cream maker on hand, you can just add 3 1/2 cups water along the syrup there and churn for 5-15 minutes. That will give you the ultimate store-bought texture!
*You can pretty much use whatever floats your bloat guys! Though, ideally, something that readily dissolves in water (i.e. not granular erythritol)!**The vitamin C powder is ideal to give that 'artificial candy flavor', and you can adjust it to taste (I like mine on the sour and use 3/4 tsp). If non is at hand, feel free to use lemon juice. Please note that nutrition facts will vary a lot depending on whether you use the powders or actual fruit juice. When I ran them, everything came out as zero carbs with the spirulina (!!)... but I'm estimating roughly 1g net with the red fruit powders!