Combine the dressing and the avocados and mash until smooth; set the guacamole aside.
In a food processor or blender, process the unrinsed black beans, the eggs, chopped cilantro, cumin, salt and hot sauce until combined. Stir in the flour and the rinsed black beans.
In a large skillet, heat 1 tablespoon oil over medium heat. Working in batches, drop rounded tablespoons of the black bean mixture into the pan and fry, turning once, until crisp, about 4 minutes on each side; add more oil between batches if necessary.
Top the black bean cakes with the guacamole and cilantro leaves.