01 - In a small bowl, thoroughly mix refried beans with taco seasoning until even.
02 - Spread the seasoned bean mixture evenly into the bottom of a large, shallow serving dish or pie plate.
03 - Gently layer guacamole over the beans, smoothing the surface for an even finish.
04 - Evenly spread 3/4 cup of the sour cream atop the guacamole.
05 - Distribute salsa across the sour cream layer for full coverage.
06 - Sprinkle shredded lettuce over the salsa, followed by a layer of shredded cheddar cheese.
07 - Scatter diced tomatoes, black olives, and sliced scallions evenly across the cheese.
08 - Place the remaining 1/4 cup sour cream into a small resealable bag. Snip off a tiny corner and pipe rings onto the surface. Drag a toothpick outward from the center at intervals to produce a spiderweb motif.
09 - Cut a black olive or cherry tomato in half for the body. Slice another for the legs and position atop the web for Halloween flair.