Heavy cream is not what makes fettuccine alfredo creamy. The dish served in Rome in the early twentieth century was fettuccine tossed with butter and a great deal of finely grated Parmigiano-Reggiano, emulsified by a little of the pasta cooking water. Cream came later, mostly in American restaurant kitchens, where it made the sauce easier to hold and serve in quantity.
Cream does make the sauce more forgiving, and this recipe uses some for that reason. But cream cannot rescue a sauce from the two real problems: cheese that clumps into gritty specks, and fat that separates into a greasy pool. Both come from the same causes, and both have straightforward fixes.
Why Alfredo Sauce Turns Grainy or Greasy
Parmigiano-Reggiano is a hard, aged cheese with relatively little moisture. When it melts smoothly, its proteins relax and spread through the liquid while its fat stays dispersed in tiny droplets. When it melts badly, the proteins tighten and squeeze together into small rubbery clumps, and the fat they were holding leaks out. The result is a sauce that feels sandy on the tongue and looks oily on the plate.
Cause 1: Too much heat
Cheese proteins tighten when they get too hot. A sauce boiling on the burner when the cheese goes in is the most common reason for graininess. The cheese only needs to reach the temperature at which its fat softens and the proteins relax, which is well below a boil. Adding it off the heat, to cream and pasta that are hot but not bubbling, avoids the problem.
Cause 2: The wrong cheese
Pre-grated cheese in tubs and bags is usually tossed with powdered cellulose or starch so the shreds do not stick together. Those coatings also stop the cheese from melting into a smooth sauce. Cheese labeled as Parmesan-style can be made differently from Parmigiano-Reggiano and may melt less evenly. A wedge of real Parmigiano-Reggiano, grated finely just before cooking, melts the most cleanly.
Cause 3: Too much cheese at once
Dumping all the cheese in together drops the temperature of the sauce in one spot and creates a thick, sticky mass that is hard to break up. Some of it melts unevenly while the rest clumps. Adding it in three parts, tossing between each, lets every portion melt into the sauce before the next goes in.
Cause 4: Not enough water
A sauce made only of butter, cream and cheese has very little water to hold the emulsion together. Starchy pasta water fixes that. The starch helps keep fat and liquid mixed and gives the sauce body without making it heavy.
The Fix: A Smooth Homemade Alfredo Sauce
The method below separates heating from melting. The cream and butter simmer briefly on the burner to thicken slightly. Then the pan comes off the heat, the hot pasta and some of its water go in, and the cheese is added in stages while everything is tossed together.
- Grate the cheese on a rasp or the finest holes of a box grater, so it looks like fluffy snow. Fine cheese melts in seconds.
- Simmer the cream and butter gently for 2 to 3 minutes, until slightly reduced, then take the pan off the burner.
- Add the drained fettuccine and 1/2 cup of pasta water, and toss to coat.
- Add the cheese a third at a time, tossing constantly with tongs until each addition disappears.
- Adjust with more pasta water until the sauce flows; it thickens quickly as it cools.
Choosing the Pasta
Fettuccine is a flat ribbon about 1/4 inch wide. Its broad surface holds a rich sauce better than round spaghetti. Fresh egg fettuccine, sold in refrigerated cases, is softer and absorbs sauce more readily; it cooks in 2 to 3 minutes, so start the sauce before the water boils. Dried fettuccine takes 10 to 12 minutes and has a firmer bite.
Cook the pasta 1 minute short of the package time. It finishes cooking in the sauce, and pasta that is fully cooked in the pot turns soft by the time it reaches the table. Scoop out a full cup of pasta water before draining; the sauce needs it, and it is easy to pour away by habit.
Reading the Sauce as You Toss
Good Alfredo changes texture quickly in the pan, and learning what each stage looks like makes the recipe repeatable without a thermometer.
Right after the pasta and water go in, the cream looks thin and pools in the bottom of the skillet. That is expected. After the first third of the cheese, the liquid turns cloudy and starts clinging to the noodles. After the second, the sauce should look like thick cream and coat the tongs. After the last third, it should be glossy and flow slowly back across the pan when you drag a path through it with the tongs. If it stops flowing and looks like paste, add pasta water a tablespoon at a time.
Steam is a useful clue to heat. A few gentle wisps rising from the pan are fine; that is hot pasta doing its job. Vigorous bubbling at the edges means the pan is too hot for cheese, even off the burner, because a heavy skillet holds heat for several minutes. If that happens, wait 30 seconds before the next addition.
Grating enough cheese
Four ounces of Parmigiano-Reggiano grated on a rasp makes about 2 loosely packed cups and looks like a lot. Weighing it on a kitchen scale is more accurate than measuring by volume, because fluffy rasp-grated cheese and dense box-grated cheese take up very different amounts of space for the same weight. The rind left over is worth keeping: dropped into a pot of soup or beans, it adds a savory depth as it simmers. Remove it before serving.
How to Make Fettuccine Alfredo
Serves four as a main course, or six as a first course. The sauce comes together in the time it takes the pasta to cook, so measure and grate everything before the water boils.
The recipe
Fettuccine Alfredo
Fettuccine tossed off the heat with butter, lightly reduced cream, finely grated Parmigiano-Reggiano added in stages, and starchy pasta water for a smooth sauce.
- Prep
- 10 min
- Cook
- 15 min
- Total
- 25 min
- Serves
- 4
Ingredients
Method
- Grate. Finely grate the cheese on a rasp or the smallest holes of a box grater.
- Cook the pasta. Bring 4 quarts (3.8 L) of water to a boil and add the salt. Cook the fettuccine 1 minute less than the package time. Reserve 1 cup of pasta water before draining.
- Start the sauce. While the pasta cooks, melt the butter in a 12-inch skillet over medium heat, add the cream and simmer gently for 2 to 3 minutes, until slightly reduced. Take the pan off the heat.
- Combine. Add the drained fettuccine and 1/2 cup pasta water to the skillet, off the heat. Toss to coat.
- Add the cheese. Add the cheese in three parts, tossing constantly with tongs until each addition melts before adding the next. Add pasta water 1 Tbsp at a time until the sauce is glossy and flows.
- Season and serve. Toss in the pepper and nutmeg, taste for salt, and serve immediately on warm plates with extra cheese.
Notes
- Avoid pre-grated cheese; anti-caking agents stop it melting smoothly.
- Leftovers keep 3 to 4 days refrigerated; reheat over low heat with a splash of milk.
Oven temperatures are for conventional ovens; for convection, reduce by about 25°F (15°C).
Serving, Leftovers and Variations
Fettuccine alfredo waits for no one. The sauce is at its silkiest in the first few minutes, so serve it on warm plates straight from the pan. Rinse the plates under hot tap water and dry them just before serving if there is no warming drawer.
Leftovers keep for 3 to 4 days in the refrigerator, but the sauce firms up and can separate when reheated. Reheat in a skillet over low heat with 2 to 3 tablespoons of milk or water per serving, tossing constantly until warm. The microwave tends to split the sauce; if using it, heat in 30-second bursts and stir between each.
Adding protein or vegetables
Sliced grilled chicken, sautéed shrimp, steamed broccoli or peas can all go into the finished pasta. Cook them separately and fold them in at the end, so their juices do not thin the sauce while the cheese is melting. For a brighter version, add finely grated lemon zest with the last addition of cheese.
For the original butter-only version, skip the cream and use 6 tablespoons of butter and 3/4 cup of pasta water, tossing vigorously; it is lighter and more delicate, and it depends even more on good cheese and constant motion.