Marketers love to sell you “organic confectionery sugar” for triple the price. Guess what? It’s still just sugar and cornstarch. The only difference is the cow that pooped on the sugar beet field was probably happier. Your wallet, however, will weep.
There’s also “powdered coconut sugar” or “powdered monk fruit sweetener.” These are impostors. They’re not the same as standard confectionery sugar because they lack that signature cornstarch kick. Use them if you must, but know that baking is a sport, and you’re playing with house rules.
Confectioners Sugar vs Powdered Sugar: Know the Difference - US Sweeteners
Surprising fact: powdered sugar was once used as a medical treatment for snake bites in the 1800s. It didn’t work. But people believed it because Victorian doctors also thought leeches cured depression. Bless their hearts.