Boil pasta: Cook penne in salted water until al dente. Reserve ½ cup pasta water, then drain.
Sauté aromatics: Heat olive oil in a skillet. Add garlic and red pepper flakes, cooking until fragrant.
Deglaze with vodka: Pour in vodka, let it simmer for a minute to burn off alcohol.
Add tomatoes: Stir in crushed tomatoes and cook for 10 minutes, stirring occasionally.
Turn up the heat: Mix in cayenne pepper for an extra spicy kick.
Make it creamy: Lower heat, add heavy cream, and stir until combined.
Finish the sauce: Toss in butter, Parmesan, and pasta water. Stir until smooth.
Mix it up: Add cooked penne and toss until coated.
Garnish and serve: Top with fresh basil and extra Parmesan.