Boil the pasta in chicken stock until al dente, about 7-8 minutes.
Drain the pasta and add 1 stick of butter, stirring gently.
Add sour cream, paprika, onion powder, garlic powder, and salt.
Add 3 cups of mixed cheeses (provolone, mozzarella, cheddar).
In a separate bowl, whisk together the eggs, milk, and heavy cream.
Layer the pasta, cheese, and custard mixture in a greased cast iron skillet.
Top with more cheese and a sprinkle of paprika.
Bake at 375°F for 45 minutes to 1 hour.
Let rest for 10 minutes before serving.
