Begin by cooking the pasta according to the package directions. Once cooked, drain the pasta but avoid rinsing it.

Next, heat a large skillet or stockpot over medium heat and add butter and olive oil. Once the butter is melted and hot, add garlic and onion and cook until the onion becomes translucent, which should take about 2-3 minutes.

Add the vodka to the skillet and simmer it until it's reduced by half, which should take approximately 4 minutes.

Now, add the crushed tomatoes, heavy whipping cream, and Italian seasoning to the stockpot. Simmer the mixture for 10-12 minutes, crushing the tomatoes with the back of a spoon while cooking.

Once the sauce appears thick and smooth, stir in the penne noodles. Finally, when you're ready to serve, garnish with optional Parmesan cheese and red chile flakes.