Cook your pasta according to packet instructions. Once cooked, drain the pasta and set aside.
While the pasta is cooking, heat butter over low-medium heat until melted in a medium sized saucepan.
Then add the minced garlic and cook for about 1 minute. Be careful not to burn your garlic.
Add the cream and bring to a gentle simmer (you don’t want the liquid to boil). Cook, whisking often, until the liquid starts to thicken slightly. This could take about 5 minutes.
Then gradually add the Parmesan cheese. Whisk until melted.
Next, add the Sriracha, salt and pepper to taste. Turn off heat and mix through cooked and drained pasta. (see note 1). Serve, garnished with red pepper flakes.