Preheat the ghost-shaped waffle maker according to the manufacturer’s instructions. Lightly grease the plates with cooking spray or melted butter before adding the batter.
In a large bowl, whisk together the flour, sugar, baking powder, and salt.
In a separate bowl, whisk the eggs, milk, melted butter, and vanilla extract until well combined.
Pour the wet ingredients into the dry ingredients and gently stir until just combined. Avoid overmixing the batter to keep the waffles light and fluffy.
Pour enough batter into the ghost-shaped waffle mold to fill it about ⅔ to ¾ full. Do not overfill, as the batter will expand while cooking and may spill over the edges.
Close the waffle maker and cook for 3–5 minutes, or according to your waffle maker’s instructions, until the ghost waffle is golden, crisp around the edges, and releases easily from the plates.
Carefully remove the ghost waffle using a silicone spatula or wooden utensil and transfer it to a cooling rack. Repeat with the remaining batter.
Allow the waffles to cool slightly before decorating. Add whipped cream or vanilla frosting over the ghost shape, then use melted chocolate, chocolate chips, or candy eyes to create spooky ghost faces.
Serve the Halloween Ghost Waffles warm with maple syrup, fresh berries, powdered sugar, or extra whipped cream.