Bring a large pot of salted water to a boil. Add penne pasta and cook according to package instructions until al dente, about 8-10 minutes. Drain and reserve half a cup of pasta water.

In a large skillet over medium heat, add olive oil. Once shimmering, add diced onion and minced garlic. Sauté for about 3 minutes until translucent.

Reduce heat to low, add cream cheese and ranch seasoning mix. Stir until cream cheese is melted and mixed, about 2-3 minutes.

Gradually pour in chicken broth and heavy cream while stirring. Simmer gently for about 5 minutes until slightly thickened.

Stir in shredded cooked chicken, half of the bacon, and grated cheddar cheese until well combined and cheese melts, around 3-4 minutes.

Add cooked pasta to the skillet, tossing until well coated with the sauce. Add reserved pasta water if the mixture is too thick.

Plate the creamy Crack Chicken Penne, garnish with remaining bacon and parsley. Serve hot.