Cornstarch-free powdered sugar
Is there anyone out there who knows of a source for cornstarch-free powdered or confectioner's sugar. I am looking for this to make French macarons. Some online sources say you can make your own by blending granulated sugar, but I doubt the sugar will be fine or consistent enough in texture to really work out well.
BTW, I don't want powdered sugar with wheat starch either - King Arthur has that.
ok if it contains tapioca starch? if so, you can buy Miss Roben's on some of the sites that carry allergen-free foods. i think allergygrocer.com has it.
alternatively, as Cheryl said, you can make your own - you'll get the best results with a coffee grinder. once it's ground, add about 1 tsp of potato or tapioca starch per cup.