If you are looking for the ultimate decadent seafood comfort meal, this Creamy Garlic Shrimp Pasta Bake is the definitive recipe. It features a massive bed of perfectly cooked spaghetti noodles folded heavily into a rich, velvety, and garlicky white cream sauce (Alfredo-Béchamel style).
Instead of hiding the seafood inside, the entire top surface is heavily blanketed in a smooth cream layer and beautifully crowned with an army of large, plump shrimp seared in garlic butter to a perfect snap-crisp texture. Baked until piping hot and bubbling, every single forkful delivers an elegant, restaurant-quality seafood pasta experience right at home!
Prep time, Cook time, & Servings
- Prep Time: 15 minutes
- Cook Time: 20 minutes
- Total Time: 35 minutes
- Servings: 6 heavy servings
Ingredients
The Snap-Crisp Garlic Shrimp:
- Shrimp: 1.5 lbs large shrimp (peeled, deveined, tails removed or left on for presentation)
- Unsalted Butter: 2 tbsp
- Garlic: 3 cloves, finely minced
- Salt & Freshly Cracked Black Pepper: To taste
The Loaded Pasta & Rich White Cream Floor:
- Spaghetti or Linguine Noodles: 1 lb (16 oz) box
- Unsalted Butter: 1/4 cup
- All-Purpose Flour: 1/4 cup (to create a smooth roux binder)
- Whole Milk or Half-and-Half: 2.5 cups (warmed)
- Heavy Whipping Cream: 1/2 cup
- Garlic Powder: 1 tsp
- Grated Parmesan Cheese: 1/2 cup (freshly grated adds amazing depth)
- Shredded Mozzarella: 1 cup (optional, for a gooey melted top blanket)
Step-by-Step Instructions
1. Boil the Pasta Al Dente
- Boil: Bring a large pot of salted water to a rolling boil. Cook your spaghetti or linguine noodles according to the package instructions until they are just under al dente (usually about 2 minutes less than the box directions).
- Drain: Drain the noodles thoroughly in a large colander and set aside. Do not rinse! The natural starches left on the noodles help the thick white sauce stick to them perfectly.
2. Sear the Plump Pink Shrimp
- Heat: Melt 2 tablespoons of butter in a large skillet over medium-high heat. Add the finely minced fresh garlic and sizzle for 1 minute until highly fragrant.
- Sear: Drop the raw peeled shrimp into the hot garlic butter. Season with a pinch of salt and plenty of cracked black pepper. Cook undisturbed for 2 minutes per side just until they turn beautifully pink, opaque, and curl into neat shapes. Immediately remove the shrimp from the skillet and set aside on a plate. Do not overcook them here, as they will finish heating in the oven!
3. Whisk the Luxurious White Sauce Matrix
- Roux: In the same skillet (retaining those delicious garlic-shrimp butter bits!), melt the remaining 1/4 cup of butter over medium heat. Whisk in the flour and cook for 1-2 minutes until a smooth, bubbling paste forms.
- Stream: Slowly pour in the warm whole milk and heavy cream in a steady stream, whisking vigorously and continuously to prevent any lumps from forming. Bring to a gentle simmer for 3-4 minutes until the liquid reduces into a thick, velvety glaze.
- Cheese: Turn off the heat. Stir in the garlic powder, extra black pepper, and freshly grated Parmesan cheese, whisking until completely melted, smooth, and glossy.
4. Combine and Assemble the Casserole
- Preheat: Preheat your oven to 375°F (190°C). Grease a large oval or rectangular clear glass baking dish lightly with butter or non-stick spray.
- Fold: Toss your cooked spaghetti noodles directly into the large skillet with the hot white sauce (or combine them in a large mixing bowl). Fold gently until every single noodle strand is heavily smothered in the cream.
- Transfer: Pour the creamy pasta base into the prepared glass dish, smoothing out the top layer uniformly. If using shredded mozzarella, sprinkle it evenly across the surface now to build a gooey blanket.
- The Shrimp Crown: Arrange your seared pink garlic shrimp symmetrically in rows flat across the entire top surface of the cream base, catching the light perfectly.
5. Bake to Bubbling Perfection
- Bake: Place the glass dish uncovered onto the middle rack of your oven and bake for 10 to 12 minutes just until the white sauce floor is bubbling fiercely around the edges and the top cheese is completely melted and gooey.
- Serve: Remove carefully from the oven, let the heavy steam clear for 2 minutes, plunge a large serving spoon deep through the loaded noodle layers, and serve piping hot!
Chef’s Tips for Success
- Prevent Overcooked Rubberuy Shrimp: The absolute secret to a gourmet seafood casserole is cooking the shrimp for only 2 minutes per side during the initial skillet sear. Seafood cooks incredibly fast, and since it undergoes a secondary heat cycle inside a 375°F oven, keeping them slightly underdone at the start ensures they remain completely plump, sweet, and snap-crisp instead of turning rubbery.
- Keep the Noodles Firm: Always cook your spaghetti pasta al dente or slightly less. The noodles will act like sponges inside the oven, drinking up the moisture from the garlic cream sauce. If they are already over-boiled at the start, the final casserole texture will turn out mushy.
- Grate Block Cheese by Hand: For that beautiful, high-gloss professional sheen on the sauce surface, always buy a wedge of Parmesan or a block of Mozzarella and shred it yourself. Bags of pre-shredded grocery store cheeses are heavily coated in powdery anti-caking starches that soak up moisture and alter the silky texture of cream sauces.