Melt Velveeta in microwave safe dish.
Add first 7 ingredients (ranch dressing through melted Velveeta) to a blender and blend well.
Add salt to taste and blend again.
In a separate bowl, mix together 3/4 cup of the sauce, shredded chicken and 1/2 cup cheddar cheese.
Spread 1/4 cup of the remaining sauce on the bottom of an 8 x 8 inch baking dish
Place about 1/3 cup of the chicken mixture in each tortilla and roll up
Add to baking dish, seam side down
Fill 6 to 8 flour tortillas with the chicken mixture until baking dish is full
Pour remaining sauce on top of enchiladas and spread it out to cover
Cook 350°F for 20 minutes
Sprinkle with remaining 1/2 cup of shredded cheddar
Return to oven for 2 to 3 minutes minutes to melt
Garnish with sour cream and green onion