Creamy Cajun Garlic Shrimp Fettuccine Alfredo in 30 Minutes Step-by-step instructions

Before you start

Before starting, gather all the ingredients and equipment to ensure a smooth cooking process. Measure out the heavy cream, grate the fresh parmesan cheese, and chop the fresh parsley. Peel and devein the shrimp, then pat them thoroughly dry with paper towels.

Fill a large pot with water for the pasta and set it on the stove. Having everything prepped and ready to go prevents the garlic from burning and ensures the shrimp are cooked perfectly without delay.

Instructions

Pasta Prep and Shrimp Seasoning

1. 1Boil the Fettuccine
   Bring a large pot of water to a rolling boil over high heat. Add the fettuccine pasta and cook according to the package directions until al dente, which typically takes about 10 to 12 minutes. Drain the pasta in a colander, reserving 1/2 cup of the starchy pasta water for adjusting the sauce later.
   Look for The pasta should be tender but still have a slight bite in the center.
   Tip Cooking the pasta in plenty of water is crucial for building the perfect texture from the very beginning of the dish.
2. 2Season the Shrimp
   Pat the peeled and deveined jumbo shrimp completely dry with paper towels to ensure a beautiful sear. Place the shrimp in a medium bowl and toss thoroughly with the Cajun seasoning until every shrimp is evenly coated with the spice mixture.
   Look for The shrimp should be fully covered in a vibrant, reddish-orange spice layer.
   Tip Drying the shrimp is key; excess moisture will cause them to steam rather than sear beautifully.

At the end of this initial phase, the fettuccine pasta is boiled to a perfect al dente texture and drained, with a portion of the starchy cooking water set aside. The jumbo shrimp are completely dry and thoroughly coated in a vibrant, fragrant layer of Cajun spices, ready to hit the hot skillet. The kitchen should smell faintly of dried herbs and spices.

Searing the Shrimp

3. 3Sear the Shrimp in Garlic Butter
   Melt 2 tablespoons of the unsalted butter in a large skillet over medium-high heat. Add the seasoned shrimp to the hot skillet in a single layer. Cook for 2 to 3 minutes per side, adding the minced garlic during the last minute of cooking, until the shrimp are pink, opaque, and reach a safe internal temperature of 145°F (63°C). Transfer the cooked shrimp and garlic to a plate.
   Look for The shrimp will turn vibrant pink and curl into a loose 'C' shape.
   Safe temperature 145°F (63°C) internal temperature (shellfish)
   Tip Do not overcrowd the skillet; cook in batches if necessary to maintain a high heat and get a nice sear.

At this point, the seasoned shrimp are beautifully seared with a caramelized, reddish-brown spice crust and a tender, juicy interior. The minced garlic is fragrant and golden, without any signs of burning.

The shrimp have reached their safe internal temperature of 145°F (63°C) and are resting on a warm plate, leaving behind a flavorful layer of browned bits in the skillet.

Sauce Simmering and Assembly

4. 4Simmer the Cream Sauce
   Reduce the skillet heat to medium and add the remaining 2 tablespoons of unsalted butter. Pour in the heavy cream and bring the mixture to a gentle simmer, scraping up any browned bits from the bottom of the pan. Let the cream simmer for 3 to 4 minutes until slightly thickened, then stir in the grated parmesan cheese until completely melted and smooth.
   Look for The sauce should coat the back of a spoon in a velvety, smooth layer.
   Tip Whisk the parmesan cheese in gradually to prevent it from clumping in the hot cream.
5. 5Toss and Garnish
   Add the cooked fettuccine and seared shrimp back into the skillet with the cream sauce. Toss everything together over low heat until the pasta is fully coated and heated through. If the sauce is too thick, splash in a little of the reserved pasta water. Garnish with the chopped fresh parsley and serve immediately.
   Look for The pasta should be glossy, creamy, and steaming hot.
   Tip Serve immediately as cream-based sauces thicken quickly as they cool down.

The final checkpoint reveals a velvety, smooth alfredo sauce that coats the back of a spoon. The pasta and seared shrimp are folded into the warm cream, creating a glossy, unified dish. The steam rising from the skillet smells richly of garlic, melted parmesan, and warm Cajun spices, with the bright green parsley adding a fresh visual contrast.

Common mistakes

One common mistake is overcooking the shrimp, which turns them rubbery and tough. To avoid this, cook them for only two to three minutes per side and remove them promptly from the skillet once they reach 145°F (63°C).

Another frequent error is using high heat when adding the parmesan cheese, which can cause the dairy to separate and become oily or clumpy. Always reduce the heat to low or medium-low before stirring in the cheese.

How to tell it’s done

The pasta is perfectly done when it is al dente, meaning it is tender but still offers a slight resistance when bitten. The shrimp are fully cooked when they turn opaque, form a loose 'C' shape, and reach an internal temperature of 145°F (63°C) on an instant-read thermometer.

The alfredo sauce is done when it has thickened enough to cling to the noodles without pooling at the bottom of the plate.

• Shellfish: 145°F (63°C) in the thickest part