Place the eggs in a saucepan and cover with cold water. Bring to a boil over high heat, then reduce to a simmer and cook for 10 minutes. Transfer eggs to ice water and let them chill until completely cooled; this makes peeling easier.
Peel the cooled eggs carefully, then slice each egg in half lengthwise. Gently remove the yolks and place them in a mixing bowl.
Mash the yolks with mayonnaise and mustard until smooth and creamy, forming the filling base. Season with salt and pepper to taste, then set aside.
Add a tiny amount of red food coloring to the yolk mixture and fold until the color is evenly distributed, mimicking bloodshot veins in the eyeball.
Transfer the colored yolk mixture into a piping bag or a small plastic bag with the tip snipped off. Pipe a generous amount into each egg white cavity to resemble the eyeball’s interior.
Using a toothpick, add small black dots or tiny drops of black pepper to create pupils or pupil-like details for the eyeballs.
Optionally, draw red veining on the surface of each egg with a toothpick dipped in red food coloring for a more gross, realistic effect.
Arrange the decorated eggs on a platter, and chill briefly if desired to let the colors set. Serve chilled to keep the appearance glossy and fresh.
Enjoy these creepy, eye-catching deviled eggs as a fun and spooky appetizer for Halloween parties.
