Begin by letting your cream cheese soften at room temperature. While that's happening, wash and chop all your vegetables, preparing them for cooking.
In a large pot or Dutch oven, melt the butter over medium heat. Add the prepared carrots, celery, onion, and cauliflower. Sauté, stirring frequently, for about 8-10 minutes until the onion becomes translucent and the other vegetables start to soften.
Stir in the minced garlic, ranch seasoning, chicken broth, and buffalo sauce. Gently place the chicken breasts into the liquid, ensuring they are fully submerged. Bring the mixture to a boil, then reduce the heat and simmer for about 10 minutes, or until the chicken is thoroughly cooked through.
Carefully remove the cooked chicken from the pot and set it aside on a plate. Ladle approximately half of the soup (including both broth and vegetables) into a blender. Blend until the mixture is creamy and smooth, then return this blended portion to the pot with the remaining soup.
Stir in the softened cream cheese until it has fully melted and is well-integrated into the soup. Shred or dice the cooked chicken into bite-sized pieces and add them back to the pot.
Allow the soup to gently simmer for another 10-15 minutes over low heat to let all the delicious flavors meld together. Serve hot with your favorite healthy toppings like shredded cheese, fresh green onions, or a dollop of sour cream for extra creaminess. Enjoy this comforting soup as a wholesome meal on its own!