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Chicken Alfredo with Costco Rotisserie Chicken

Real Alfredo — just butter, Parmesan, and pasta water — elevated with Costco rotisserie chicken for a 25-minute dinner.

Prep Time
5 min
Cook Time
20 min
Servings
4
Cost / Serving
$6.74

Quick Answer

Toss hot pasta with melted butter, grated Kirkland Parmesan, and starchy pasta water — no cream needed. Add shredded Costco rotisserie chicken at the end so it doesn't dry out. Ready in 25 minutes; serves 4.

Authentic Roman Alfredo contains exactly two ingredients beyond the pasta: butter and Parmigiano-Reggiano. The creaminess comes entirely from emulsifying the fat with starchy pasta water — no cream required. Stirring in shredded rotisserie chicken at the end turns a simple Roman preparation into a complete meal. Costco's large tub of Kirkland Parmigiano-Reggiano is ideal here — you need good Parmesan and plenty of it.

Instructions

  1. 1

    Bring a large pot of water to a boil. Season it generously with kosher salt — it should taste pleasantly salty, like mild seawater. Use at least 4 quarts of water so the pasta has room to move and the starch concentration in the water stays at the right level for the sauce.

  2. 2

    Cook the fettuccine according to package directions until 1 minute shy of al dente — it will finish cooking in the sauce. Before draining, use a ladle or measuring cup to scoop out at least 1 full cup of pasta water and set it aside. This starchy water is the emulsifier that makes the sauce coat the pasta instead of pooling at the bottom. Do not skip this step.

  3. 3

    Drain the pasta (do not rinse it — you want the surface starch). Immediately add the hot pasta to a large skillet or the now-empty pasta pot over the lowest possible heat setting. Add the butter pieces on top of the pasta.

  4. 4

    Add 1/4 cup of the reserved pasta water to the pan. Using tongs, toss the pasta vigorously and continuously for 60–90 seconds as the butter melts and emulsifies with the water. The liquid should look creamy and slightly thickened, coating each strand. If it looks greasy or separated, add another splash of pasta water and keep tossing.

  5. 5

    Remove the pan from heat entirely. This is important — adding Parmesan over direct heat causes it to clump and seize. Add the finely grated Parmigiano-Reggiano in two or three additions, tossing constantly between each addition. Use tongs and keep everything moving. Add pasta water a tablespoon at a time if the sauce tightens up too much.

  6. 6

    Add the shredded rotisserie chicken and toss to distribute throughout the pasta. The residual heat of the pasta and sauce will warm the chicken through in about 1 minute. Season generously with freshly cracked black pepper and taste for salt — the Parmesan is salty, so you may not need much.

  7. 7

    Serve immediately in warmed pasta bowls. Top with additional Parmigiano-Reggiano, more black pepper, and a scattering of fresh parsley if desired. Alfredo waits for no one — it begins to thicken as it cools, so get it to the table right away.

Frequently Asked Questions

How do you make real Alfredo sauce without cream?+
Authentic Alfredo sauce is made by emulsifying butter and finely grated Parmigiano-Reggiano with starchy pasta cooking water. The starch in the water acts as a binding agent that holds the fat in suspension, creating a silky, creamy sauce with no dairy cream needed. The keys are: using water that's hot and starchy (from actually cooking pasta in it), adding cheese off direct heat to prevent clumping, and tossing vigorously and constantly. The technique takes about 2 minutes once you have everything in the pan.
Why does Alfredo sauce break and how do I fix it?+
Alfredo sauce breaks (turns greasy and separated) when there's too much fat relative to the emulsifier (starchy water), or when the heat is too high when the cheese goes in. To fix a broken sauce: move the pan off heat immediately, add a splash (1–2 tablespoons) of hot pasta water, and toss vigorously. The extra starchy liquid re-emulsifies the fat. Prevention: always add Parmesan with the heat completely off, grate it very finely (a microplane works best — coarser graters leave chunks that don't melt smoothly), and use room-temperature butter rather than cold.
Can I use heavy cream instead of pasta water?+
Yes, but it changes the dish into something closer to an American cream Alfredo rather than the Roman original. If using cream: melt butter in a pan, add 1/2 cup heavy cream, simmer for 2 minutes until slightly reduced, then add Parmesan off heat. The cream provides more fat and richness and is more forgiving than the butter-water method, but the result is heavier. Many people prefer it, especially for a richer weeknight pasta. Use about 1/2 cup for 4 servings.
How do you reheat chicken Alfredo without it getting clumpy?+
The best method is stovetop with a splash of water or chicken broth. Add the leftover pasta to a pan over medium-low heat with 2–3 tablespoons of water or broth and toss constantly as it heats. The added liquid re-emulsifies the sauce as the pasta warms. Microwave reheating works in a pinch — cover the bowl, microwave at 50% power in 45-second intervals, stirring in between, and add a splash of water each time. Never microwave at full power; it seizes the cheese and dries everything out.
What pasta shape is best for Alfredo?+
Fettuccine is the traditional and most popular choice — its wide, flat surface area gives the butter-Parmesan sauce plenty to cling to. Tagliatelle is essentially identical and works just as well. Pappardelle is even wider and creates a very luxurious mouthful. Linguine works but is a step down. Avoid spaghetti (too round and slippery for a butter sauce), penne or rigatoni (tubular shapes work better with chunkier sauces), or angel hair (too delicate and becomes gluey). Kirkland's fettuccine from the 4 lb bag is a great budget option and cooks evenly.

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