Boil your pasta to al dente in heavily salted water.
Melt your butter and olive oil together in a pan over medium heat. As they melt, add the chili flakes.
Add the pressed garlic, shallot and the tomato paste and sautée until the shallot becomes translucent and the garlic and tomato paste are fragrant.
Add the heavy cream and cook until the sauce darkens. About 5 minutes.
Add the vodka and cook for 5-6 minutes until the alcohol cooks out.
Drain your al dente pasta and reserve 1-2 cups of pasta water.
Add 3/4 cups of pasta water to your sauce and cook until it starts to thicken, about 5-10 minutes.
Add the pasta to the sauce and allow to finish cooking. If necessary, add a little bit more pasta water - just until the sauce is the desired texture.
Add fresh grated parmesan, chili flakes, parsley and serve.