Yes, you can freeze cooked fettuccine. However, in order to guarantee the best results for cooking once you thaw, there are a few tips and tricks to be aware of. Try tossing it with olive oil, and then separating into ‘nests’ before transferring into an air-tight bag for the freezer. This will ensure that the fettuccine doesn't stick together and maintains its texture when you come to cooking it. When you're ready to cook, simply thaw the fettuccine in your fridge overnight. This method preserves the fettuccine’s quality and prevents it from becoming mushy.