01 - In a mixing bowl, combine refried beans and taco seasoning, mixing until fully incorporated.
02 - Spread the seasoned beans evenly into the bottom of a large shallow serving dish or pie plate.
03 - Gently layer guacamole over the beans, smoothing to cover the entire surface.
04 - Spread 3/4 cup sour cream over the guacamole to form an even layer.
05 - Distribute salsa evenly atop the sour cream.
06 - Sprinkle shredded lettuce followed by cheddar cheese over the salsa.
07 - Scatter diced tomatoes, black olives, and sliced scallions over the cheese.
08 - Place remaining 1/4 cup sour cream into a resealable bag, snip a small corner, and pipe circles over the dip. Drag a toothpick from the center outward at intervals to create a spiderweb design.
09 - For optional decoration, halve a black olive or cherry tomato for the spider body. Slice additional olive or tomato for legs and arrange atop the web.