Who needs seven layers when you can have the five best ones? Fine! If you really need a seven-layer dip then you can sprinkle on chopped green onions, sliced black olives, and browned ground beef. Oh, wait, that's eight...
Spread the beans onto the bottom of your serving dish. Stir the sour cream together with the taco seasoning, then spread over the beans. Keep going with the guacamole, salsa, and Cheddar cheese: you know what to do.