Bring a large pot of salted water to boil over high heat. Once the water is boiling, add the penne to cook. Stir so they do not stick - reduce the heat to medium. Start the sauce immediately while cooking this pasta until al dente - 11-13 minutes.
1 pound penne pasta
In a large skillet, warm 1 tablespoon of olive oil over medium-low heat. Add the garlic and onion, stir and cook for 3 minutes or until soft.
2 tablespoons olive oil, 1 small onion, 6 cloves garlic
Add the tomato paste & crushed red pepper flakes to the skillet. Continue to cook, stir often, until the paste starts to deepen in color - 5 minutes.
6 ounces tomato paste, ½ teaspoon red pepper flakes
Add the vodka to the pan to deglaze - stir to remove any bits that are at the bottom of the pan. Reduce heat to low.
½ cup vodka
Remove some of the pasta water from the penne while it cooks - use a heat-proof medium-sized glass measuring cup to scoop out ½ cup of starchy hot water.Add the heavy cream to the starchy water in the measuring cup. Stir to bring them together. This creates a creamy combination that wont separate, curdle, or break apart once heated in the pan. - DO NOT SKIP THIS STEP
½ cup starchy pasta water, 1 cup heavy cream
Add the cream mixture to the pan and stir to combine.
Once the pasta is ready, DO NOT strain through a colander. Turn the heat off the pasta pot. Using a slotted spoon, remove the cooked penne pasta and add to the pan with the sauce. Any residual pasta water along for the ride is just fine.
Add half of the parmesan cheese to the sauce and pasta, stir and notice the pasta sauce will start to thicken.If you wish to have a thinner sauce add in a tablespoon more of starchy pasta water until the desired consistency is reached.
6 ounces parmesan cheese
Turn the heat off the skillet and top with fresh basil & remaining parmesan cheese.Scoop into individual pasta bowls or plates. Enjoy immediately while fresh & hot.
6 leaves fresh basil
Notes
TOP TIPS:
Do not overcook the pasta or strain in a colander (save the pasta water!)
Do not substitute the heavy cream for other lower fat or non-dairy products.
Make sure to follow the steps in the sauce making process exactly as written for the best silky results.
STORING & REHEATING:
Store leftovers in the refrigerator for up to 5 days. I do not recommend freezing since cream sauces do not do well once frozen.
To reheat, heat up in a skillet on medium heat & add a splash of cream to bring it back to the best consistency.
SUBSTITUTIONS & VARIATIONS:
Substitute other short tube pasta such as mostaccioli, rigatoni, or ziti.
Spicy: double the amount of red pepper flakes.
Gluten-Free; use your favorite gluten-free, rice, or chickpea pasta and do not overcook it.
Vegetarian - omit the parmesan cheese or use a vegan variety.