These Glow-in-the-Dark tonic deviled eggs are a spooky showstopper for any Halloween party. Using tonic water in the egg whites, they glow under blacklight — making them a creepy, fun addition to your snack table. Perfect for adult Halloween party food, kids Halloween food, or unique Halloween appetizers, these glowing eggs are easy to make and unforgettable. Add them to your Halloween party snacks spread for a hauntingly fun surprise.