In a blender or food processor, combine avocado, ranch dressing, sour cream, lime juice, cilantro, and salt. Blend until smooth.
Thinly slice the chicken breasts.
Lay wraps flat.
Divide the chicken and spread evenly over the 4 wraps.
Sprinkle the cheese over the chicken.
Add the chopped romaine.
Drizzle with the avocado ranch dressing.
Fold in the sides and roll tightly.
Slice in half and serve with extra sauce.
Notes
Slice chicken very thin for authentic texture that's easy to bite through. Thick chunks make the wrap hard to eat and the chunks can fall out after each bite.
Warm tortillas slightly before rolling to prevent cracking. Just 10-15 seconds in the microwave under a slightly damp paper towel makes them soft and easy to roll.
Don't overfill the wraps or they won't close properly and will fall apart when you bite into them.
Drizzle dressing lightly inside the wrap. Too much makes it soggy. Serve extra on the side for dipping.
Press plastic wrap directly on the dressing surface when storing to prevent browning from air exposure.
Roll tightly and tuck as you go. Loose wraps fall apart when you slice and eat them.
Slice wraps diagonally for prettier presentation and easier handling.