Slice the avocados in half, remove the pits, and scoop the flesh into a mixing bowl. Mash until smooth yet slightly chunky.

Squeeze the juice of the lime into the mashed avocado mixture and mix well.

Add the chopped onion, diced tomatoes, and minced jalapeño to the bowl and fold together.

Season with salt and pepper to taste, mixing well.

Transfer the guacamole to a serving platter, shaping it into a brain-like figure.

Drizzle red food coloring over the guacamole in a vein-like pattern for a spooky effect.

Serve with spooky-shaped tortilla chips or vegetable sticks for scooping.