Do I really need vodka?
No, but it is worth it if you have it. It simmers down and most of the alcohol cooks off, and what is left is a slightly brighter, smoother tomato flavor. If you want to skip it, swap in chicken broth or a little extra pasta water.
What does vodka actually do in the sauce?
It is not a gimmick. Many cooks find a splash of vodka gives tomato sauce a cleaner, slightly brighter edge once it reduces, and it helps the flavors come together in that classic vodka-sauce way.
What is the best rigatoni to buy?
Look for a sturdy, bronze-cut rigatoni if you can. It is usually a little rougher on the surface, which helps sauce cling. Regular supermarket rigatoni still works great.
Can I make it less spicy?
Absolutely. Use sweet Italian sausage and cut the red pepper flakes down to a pinch. You can always add heat at the table.
Can I make it more spicy?
Use hot Italian sausage, add extra red pepper flakes, and finish with a drizzle of chili oil. A spoonful of Calabrian chiles is also a power move.
How do I keep the sauce from breaking?
Keep the heat at a gentle simmer once the cream goes in, and do not boil it hard. If it looks a little grainy, pull it off the heat and stir in a splash of cream or pasta water until smooth.
Can I use milk instead of heavy cream?
You can, but it will be less rich and a bit more likely to split. If using milk, go with whole milk and keep the heat low. A tablespoon of cream cheese can help stabilize the sauce in a pinch.
Any easy variations?
Sure. Swap rigatoni for penne, add a few handfuls of baby spinach at the end until just wilted, or trade some sausage for pancetta if you want a slightly smokier, saltier vibe.