Start by slicing the ripe avocados in half and removing the pits. Scoop the flesh into a mixing bowl and mash until smooth, leaving some chunks for texture. Add lime juice and salt.

Fold in diced onions and chopped cherry tomatoes into the avocado mixture. Stir gently to combine, adding fresh cilantro if desired.

Transfer the guacamole into a serving bowl, smoothing the top. Pipe a spiral shape with chilled sour cream starting from the center.

Slice black olives to create spider shapes, placing them atop the sour cream web for added decoration.

Arrange tortilla chips around the guacamole bowl for easy serving.