People likely won't even notice that these delicately nutty, just a little chocolaty, blondies are gluten-free. They use quinoa flour, which you can find in well-stocked supermarkets and natural-foods stores, in place of all-purpose flour. To make your own quinoa flour, grind raw quinoa into a powder in a clean coffee grinder. (Adapted from Quinoa Revolution by Patricia Green and Carolyn Hemming.) Download a FREE Top 10 Appetizer Recipe Cookbook!