What pasta works best for shrimp Alfredo?
Fettuccine is the classic because the wide noodles grab the sauce. Linguine, tagliatelle, or even penne work great. Use what you have, just cook it al dente.
How do I keep Alfredo sauce from getting grainy?
Use finely grated Parmesan (not the shelf-stable shaker kind and not pre-shredded), keep the heat low when adding cheese, and stir until melted. If it looks like it is breaking, take it off the heat and stir in a splash of warm pasta water.
Can I use pre-cooked shrimp?
You can, but treat it gently. Skip the sear and just warm the shrimp in the sauce for 1 to 2 minutes at the end so it does not dry out.
Can I make it lighter?
Swap heavy cream for half-and-half. The sauce will be thinner, so use a little more Parmesan and pasta water to help it cling. I do not love using straight milk here unless you add a cornstarch slurry, because it can end up flat.
What if my sauce is too thick?
Add hot pasta water, a tablespoon at a time, tossing until it loosens and turns glossy.
What if my sauce is too thin?
Simmer 1 to 3 minutes longer, stirring, then add a little more Parmesan. It thickens as it cools too, so do not overcorrect.
What size shrimp should I buy?
Large shrimp in the 16/20 or 21/25 range are ideal here. They cook fast but still feel juicy and substantial. If your shrimp are smaller, shave a minute off the cook time.