Bring a large pot of salted water to boil. Cook your pasta according to the instructions and drain, saving 1 cup of pasta water. Set the cooked pasta and pasta water to the side.
8 oz dried pasta
Place a large saucepan over medium heat. Once warm, add the olive oil. Once the olive oil starts to shimmer add the garlic and onion. Cook for 3 minutes but don't let it brown. Add the tomato paste and mix together using a wooden spoon.
1 tablespoon olive oil, ½ white onion, 3 garlic cloves, ⅔ cup tomato paste
Add the Calabrian chiles and vodka (if using), cook and stir for 2 minutes.
Add the heavy cream and stir together, let simmer for 2-3 minutes.
½ cup heavy cream
Add the cooked pasta and toss in the butter and parmesan. Mix everything together.
2 tablespoons unsalted butter, ½ cup grated parmesan
If the sauce is too thick you can drizzle in pasta water until it is the consistency you desire.
Notes
Storage: Store any leftovers in an airtight container in the fridge for up to 3 days. Reheat in the microwave or in a saucepan with a splash of cream. Smooth Sauce: if you prefer a smooth and silky sauce, before you add the pasta pour the sauce into a blender and blend until smooth. Pour back into the saucepan and add the pasta, butter and parmesan. Calabrian Chiles: you can find these in the grocery store or at Trader Joe's (where it's called bomba hot pepper sauce!). Adjust the amount depending on how spicy you want the pasta to be. You can swap it out for dried chili flakes. Double the recipe: this makes enough for 2 people. Double all of the ingredients for 4 people.