Cupcakes with dollars baked inside! I saw this idea on the net! Wrap folded bills tightly in foil. Using a standard cupcake recipe, fill cupcake liner half full of batter, then the foil packet, then more batter. Bake as directed, and voila! I thought it might be a cute recipe for kids, say tooth fairy or birthday treats. I bet you could also use little gift certificates too!
And hey, it's Christmas time, I wonder if it would work with diamond earrings?