Edible glitter recipes have been around for a while and differ in technique but I think this one is the easiest with the most success for sparkle
Rose Gold Champagne Glitter, Edible Glitter
Difference Between Edible Glitter & Luster Dust
Sparkly pizza, bagels and gravy: Nothing is safe from edible glitter
3 Ways: Make Cocktails That Sparkle [+ Bonus]
Easy Edible Gold OREOS for St. Patrick's Day (Tutorial & Video)
4 Ways to Make Edible Glitter - wikiHow
OREO Cookie Ball Christmas Lights
How to Make Edible Glitter (Easy Recipe)
Watercolored Buttercream Edible Sugar Crystal Glitter Filled Cake - Ashlee Marie - real fun with real food
Edible Glitter Recipe + tutorial + video, Sugar Geek Show