In a large mixing bowl, combine the cream cheese, shredded cheddar cheese, ranch seasoning mix, and sour cream. Blend until creamy and smooth.

Shred the cooked chicken and fold it into the cheesy mixture, adding green onions or bacon if desired.

Lay out the flour tortillas. Evenly spread the chicken mixture onto each tortilla.

Roll each tortilla tightly from one end, placing the seam-side down on plastic wrap.

Wrap each log in plastic wrap and refrigerate for at least 30 minutes.

Slice each log into 1-inch pieces and arrange on a platter. Garnish with green onions if desired.