This recipe is great for Halloween parties: spread a layer of Mexican bean dip over a large round plate. Carefully spread a layer of guacamole over this. Put sour cream in a pastry bag fitted with a small round tip and pipe concentric circles on the guacamole. Take a toothpick or wooden skewer and drag it through the sour cream from the centre outward to make spider web design.
Serve with tortilla chips.