01 - Combine refried beans and taco seasoning in a medium bowl and mix thoroughly.
02 - Evenly spread seasoned beans onto the bottom of a large shallow serving dish or pie plate.
03 - Gently layer guacamole over the beans and smooth with a spatula.
04 - Spoon 3/4 cup sour cream into a small bowl and spread over the guacamole.
05 - Evenly distribute salsa as the next layer, spreading gently to keep layers distinct.
06 - Sprinkle shredded lettuce evenly over the salsa.
07 - Add shredded cheddar cheese, then scatter diced tomatoes, sliced black olives, and green onions.
08 - Transfer remaining 1/4 cup sour cream into a small zip-top bag, snip the corner, and pipe concentric circles over the surface. Drag lines from the center outward with a toothpick or skewer to create a spiderweb pattern.
09 - Slice one black olive in half for the body and use thin strips cut from another olive for the legs. Arrange on the web as a decorative spider.
10 - Serve immediately with tortilla chips or cover and refrigerate until ready to enjoy.