Sear Chicken:
In a large pot or deep skillet, heat olive oil over medium-high heat. Add diced chicken, season with salt and pepper, and cook until browned and cooked through. Remove and set aside.

Sauté Garlic:
In the same pot, reduce heat to medium. Add garlic and cook for 1 minute until fragrant.

Add Liquids & Pasta:
Pour in chicken broth, buffalo sauce, and ranch dressing. Stir to combine. Add uncooked penne pasta and bring to a boil.

Simmer:
Reduce heat to low, cover, and simmer for 12–15 minutes, stirring occasionally, until pasta is cooked and liquid is mostly absorbed.

Stir in Chicken & Cheese:
Return cooked chicken to the pot. Stir in cheddar and mozzarella cheeses until melted and creamy.

Serve:
Garnish with green onions or parsley if desired. Serve hot and enjoy the spicy, creamy comfort of this one-pot wonder!