Keto Cheesy Shrimp Casserole – Comforting, Low-Carb, and Loaded With Flavor
This Keto Cheesy Shrimp Casserole brings all the cozy, creamy comfort you want from a baked dish—without the heavy carbs. Juicy shrimp, sautéed veggies, and a rich cheese sauce come together in one easy pan. It’s perfect for weeknights when you want something satisfying but simple.
The flavors are familiar and crowd-pleasing, and the prep is straightforward. Serve it with a crisp green salad or steamed broccoli, and dinner is done.
Ingredients
Method
- Prep the oven and dish: Preheat oven to 375°F (190°C). Grease a 9x13-inch baking dish with a little olive oil or butter.
- Season the shrimp: Pat shrimp dry. Toss with a pinch of salt, pepper, and half the smoked paprika. Set aside.
- Sauté the aromatics: In a large skillet, heat butter and olive oil over medium heat. Add onion and bell pepper. Cook 3–4 minutes until softened. Stir in garlic and cook 30 seconds until fragrant.
- Add cauliflower rice: Stir in cauliflower rice and a pinch of salt. Cook 3–5 minutes until moisture evaporates and it’s just tender. Transfer mixture to a large bowl.
- Make the cheese sauce: In the same skillet over low heat, add cream cheese, heavy cream, and broth. Whisk until smooth. Stir in 1.5 cups shredded cheese, Parmesan, Italian seasoning, remaining smoked paprika, crushed red pepper (if using), lemon zest, and lemon juice. Simmer 2–3 minutes until slightly thickened. Taste and season with salt and pepper.
- Combine: Pour the cheese sauce over the cauliflower mixture. Add the seasoned shrimp and half the parsley. Fold gently to coat everything.
- Assemble the casserole: Spread the mixture evenly in the baking dish. Top with the remaining 1/2 cup shredded cheese.
- Bake: Bake 12–15 minutes, just until the shrimp are pink and opaque and the edges are bubbling. Do not overbake.
- Optional broil: For extra color, broil 1–2 minutes until the top is lightly golden. Watch closely.
- Finish and serve: Let rest 5 minutes. Garnish with remaining parsley. Serve hot with a squeeze of lemon if you like.
What Makes This Recipe So Good
- Low-carb and satisfying: You get creamy, cheesy goodness without pasta or breadcrumbs.
- Quick prep: Shrimp cooks fast, and the casserole bakes in under 20 minutes once assembled.
- One-pan friendly: Sauté, mix, and bake with minimal mess.
- Flexible flavors: Swap cheeses, add low-carb veggies, or adjust the spice to your taste.
- Meal prep friendly: It reheats well for lunches or make-ahead dinners.
What You’ll Need
- Shrimp: 1.5 pounds large shrimp, peeled and deveined (tails off).
- Butter or ghee: 3 tablespoons.
- Olive oil: 1 tablespoon.
- Garlic: 3 cloves, minced.
- Onion: 1/2 medium, finely chopped.
- Bell pepper: 1 small, diced (red or green).
- Cauliflower rice: 2 cups, fresh or frozen (thawed and well-drained).
- Cream cheese: 6 ounces, softened.
- Heavy cream: 3/4 cup.
- Chicken or seafood broth: 1/2 cup (low-sodium).
- Shredded cheese blend: 2 cups, divided (cheddar, mozzarella, or Monterey Jack).
- Parmesan: 1/4 cup, grated.
- Smoked paprika: 1 teaspoon.
- Italian seasoning: 1 teaspoon (or dried oregano and basil).
- Crushed red pepper flakes: 1/4 teaspoon (optional).
- Lemon zest: 1 teaspoon, plus 1 tablespoon lemon juice.
- Fresh parsley: 2 tablespoons, chopped (for garnish).
- Salt and black pepper: To taste.
Step-by-Step Instructions
- Prep the oven and dish: Preheat oven to 375°F (190°C). Grease a 9×13-inch baking dish with a little olive oil or butter.
- Season the shrimp: Pat shrimp dry.
Toss with a pinch of salt, pepper, and half the smoked paprika. Set aside.
- Sauté the aromatics: In a large skillet, heat butter and olive oil over medium heat. Add onion and bell pepper.
Cook 3–4 minutes until softened. Stir in garlic and cook 30 seconds until fragrant.
- Add cauliflower rice: Stir in cauliflower rice and a pinch of salt. Cook 3–5 minutes until moisture evaporates and it’s just tender.
Transfer mixture to a large bowl.
- Make the cheese sauce: In the same skillet over low heat, add cream cheese, heavy cream, and broth. Whisk until smooth. Stir in 1.5 cups shredded cheese, Parmesan, Italian seasoning, remaining smoked paprika, crushed red pepper (if using), lemon zest, and lemon juice.
Simmer 2–3 minutes until slightly thickened. Taste and season with salt and pepper.
- Combine: Pour the cheese sauce over the cauliflower mixture. Add the seasoned shrimp and half the parsley.
Fold gently to coat everything.
- Assemble the casserole: Spread the mixture evenly in the baking dish. Top with the remaining 1/2 cup shredded cheese.
- Bake: Bake 12–15 minutes, just until the shrimp are pink and opaque and the edges are bubbling. Do not overbake.
- Optional broil: For extra color, broil 1–2 minutes until the top is lightly golden.
Watch closely.
- Finish and serve: Let rest 5 minutes. Garnish with remaining parsley. Serve hot with a squeeze of lemon if you like.
How to Store
- Refrigerate: Cool completely, then store in an airtight container for up to 3 days.
- Reheat: Warm gently in a 300°F (150°C) oven, covered, for 12–15 minutes, or microwave in short bursts.
Avoid overheating so the shrimp don’t turn rubbery.
- Freeze: Best enjoyed fresh, but you can freeze tightly sealed portions for up to 1 month. Thaw overnight in the fridge before reheating. Expect a slightly looser texture from the dairy.
Health Benefits
- High in protein: Shrimp delivers lean protein that supports muscle repair and satiety.
- Low in carbs: Cauliflower rice keeps the casserole keto-friendly without sacrificing texture.
- Healthy fats: Cheese, cream, and butter provide fats that help you stay full on a low-carb diet.
- Micronutrients: Shrimp contains selenium, iodine, and vitamin B12.
Vegetables add vitamin C, fiber, and antioxidants.
- Gluten-free: Naturally free of gluten when you use gluten-free broth and seasonings.
Common Mistakes to Avoid
- Overcooking the shrimp: Shrimp cook fast. Bake just until pink and curled into a loose “C,” not tight “O.”
- Watery casserole: If using frozen cauliflower rice, thaw and squeeze out excess moisture. Cook off liquid in the pan before baking.
- Undersalting the sauce: Taste the cheese sauce and adjust salt and acid.
A bit of lemon brings everything to life.
- Too much heat: Red pepper flakes are optional. Add lightly so they don’t overpower the creamy flavors.
- Skipping the rest time: Let the casserole sit for a few minutes. It sets up and slices more cleanly.
Recipe Variations
- Spinach and artichoke: Fold in 2 cups fresh spinach and 1/2 cup chopped artichoke hearts (well-drained) with the sauce.
- Cajun twist: Add 1–2 teaspoons Cajun seasoning and use pepper jack cheese for a little heat.
- Bacon and mushroom: Sauté 4 slices chopped bacon until crisp, remove, then cook 1 cup sliced mushrooms in the drippings.
Fold both into the casserole.
- Broccoli cheddar: Swap cauliflower rice for 2 cups small broccoli florets, steamed until just tender. Use sharp cheddar.
- Dairy-light option: Reduce cream cheese to 4 ounces and heavy cream to 1/2 cup; add an extra 1/4 cup broth to keep it saucy.
- Zesty lemon-herb: Double the lemon zest, skip the paprika, and add fresh dill or chives for a brighter profile.
FAQ
Can I use frozen shrimp?
Yes. Thaw completely, pat very dry, and remove excess moisture so the casserole doesn’t get watery.
Frozen shrimp often release more liquid, so keep an eye on bake time.
What cheeses work best?
A blend melts smoothly and adds flavor. Try mozzarella for stretch, cheddar for sharpness, and Parmesan for umami. Monterey Jack or Gruyère are great swaps.
Can I make it ahead?
You can assemble the casserole up to the baking step, cover, and refrigerate for up to 24 hours.
Add a few extra minutes to the bake time if starting cold.
How do I keep it keto?
Stick to low-carb veggies like cauliflower, broccoli, spinach, or mushrooms. Use full-fat dairy, and avoid thickeners like flour or cornstarch.
What can I serve with it?
Pair with a simple green salad, roasted asparagus, sautéed zucchini, or steamed green beans. A lemony vinaigrette keeps the meal light and fresh.
Can I substitute the shrimp?
Yes.
Try cubed cooked chicken, scallops, or a mix of shrimp and crab meat. Adjust bake time to avoid overcooking seafood.
In Conclusion
This Keto Cheesy Shrimp Casserole is proof that low-carb comfort food can be rich, warm, and genuinely tasty. It’s quick enough for busy nights and special enough for guests.
With easy swaps and reliable leftovers, it’s the kind of recipe you’ll keep on repeat. Keep the ingredients on hand, and you’ll always have a satisfying, flavorful dinner ready to go.
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