extra-virgin olive oil - 2 tablespoons (plus more as needed)
unsalted butter - 2 tablespoons
onion - 1 (large, finely chopped)
carrots - 2 (finely chopped)
garlic - 5 (cloves, minced)
pancetta or Pudo - 8 ounces (finely chopped/minced, optional substitution for Pudo)
ground beef (80/20) - 2 pounds
tomato paste - 4 tablespoons
dry white wine - 1 cup (or red wine, based on preference)
crushed San Marzano tomatoes - 28 ounces
passata - 1 1/2 cups
chicken stock - 2 1/2 cups
parmesan rind - 1 piece (optional)
dried chili flakes - 1/2 teaspoon (optional)
whole milk - 1 cup
heavy cream - 1/3 cup (optional, to finish)
pappardelle, tagliatelle, or spaghetti - 1 pound (for serving)
Parmigiano-Reggiano - watch the video to see (freshly grated, for serving)