First I place the raw chicken breasts into my slow cooker. Then I coat them evenly with kosher salt, seasoned salt, black pepper, red pepper flakes, and dried thyme. I pour 5 cups of chicken broth over and around the chicken so it’s just covered, which ensures even cooking and flavor infusion.
I set the slow cooker on low and let the chicken cook for 5 to 6 hours. During this time, it becomes tender enough to shred effortlessly. This slow process develops depth in the base broth, rather than rushing with high heat.
Once the chicken is cooked, I shred it in the broth using two forks or tongs. Then I stir in the softened cream cheese until it melts into the liquid. Next, I add the ranch dressing mix, pasta, and milk—then stir gently to combine. I cover it back up and switch the slow cooker to High for 30 more minutes so the pasta softens and the sauce thickens.
While the pasta bubbles away, I crisp up the bacon in a skillet over medium-high heat, turning occasionally until evenly browned (about 10 minutes). Then I transfer it to paper towels to drain and crumble it once cooled.
With the pasta tender but still slightly firm, I add shredded cheddar and crumbled bacon, stirring until everything is well combined and the cheese melts completely (another ~10 minutes). Adjust seasoning to taste.