Keto Shrimp and Broccoli Casserole – Creamy, Comforting, and Low-Carb
If you love creamy comfort food but want to keep things light and low-carb, this Keto Shrimp and Broccoli Casserole checks all the boxes. It’s rich, cheesy, and full of flavor, yet it won’t kick you out of ketosis. Tender shrimp, crisp-tender broccoli, and a velvety cheese sauce come together in one easy bake.
It’s weeknight-friendly, meal-prep friendly, and always satisfying. Add a simple side salad, and dinner is done.
Ingredients
Method
- Prep your oven and pan: Heat the oven to 375°F (190°C). Grease a 9x13-inch baking dish with olive oil or butter.
- Blanch the broccoli: Bring a pot of salted water to a boil. Cook broccoli florets for 2 minutes, then drain and rinse under cold water. Pat dry so the casserole doesn’t get watery.
- Season the shrimp: Pat shrimp dry. Toss with a pinch of salt, pepper, and half the paprika. Dry shrimp sear better and keep a firm bite.
- Sauté the shrimp: In a large skillet, melt 1 tablespoon butter over medium-high heat. Add shrimp in a single layer and cook 1–2 minutes per side until just pink. Remove to a plate. Do not overcook—they’ll bake again.
- Build the sauce base: Lower heat to medium. Add remaining butter to the skillet with minced garlic. Cook 30 seconds until fragrant, not browned.
- Add the cream and cream cheese: Pour in heavy cream and whisk in cream cheese until smooth and slightly thickened, 2–3 minutes.
- Season and melt the cheeses: Stir in onion powder, remaining paprika, crushed red pepper, lemon zest, half the cheddar, and the Parmesan. Simmer gently, stirring, until melted and creamy. Taste and adjust salt and pepper.
- Assemble the casserole: Spread broccoli in the prepared dish. Nestle shrimp evenly over the top. Pour the cheese sauce all over, letting it settle into the gaps.
- Top and bake: Sprinkle remaining cheddar on top. Bake 12–15 minutes until bubbling at the edges and lightly golden.
- Rest and garnish: Let it stand 5 minutes to set. Finish with chopped parsley or chives for freshness. Serve warm.
What Makes This Special
This casserole gives you the feel of a classic cheesy bake without the starches. Instead of pasta or rice, you get broccoli for crunch and fiber and shrimp for quick-cooking protein.
The sauce is made with cream, cheese, and a touch of seasoning for that cozy, restaurant-style taste. It’s a one-pan meal, bakes in under 30 minutes, and reheats well. Plus, it’s flexible—easy to adjust for spice, extra veggies, or dairy tweaks.
What You’ll Need
- Shrimp: 1.5 pounds large shrimp, peeled and deveined (tails off)
- Broccoli: 5 cups broccoli florets (fresh or frozen, thawed and well-drained)
- Butter: 3 tablespoons (for sautéing and sauce)
- Garlic: 3 cloves, minced
- Heavy cream: 1.25 cups
- Cream cheese: 4 ounces, softened
- Cheddar cheese: 1.5 cups shredded, divided
- Parmesan: 1/3 cup grated
- Lemon zest: 1 teaspoon (optional but brightens the dish)
- Smoked paprika: 1/2 teaspoon (or regular paprika)
- Onion powder: 1/2 teaspoon
- Crushed red pepper: 1/4 teaspoon (optional, for a little heat)
- Salt and pepper: To taste
- Olive oil: 1 tablespoon
- Fresh parsley or chives: 2 tablespoons, chopped (for garnish)
How to Make It
- Prep your oven and pan: Heat the oven to 375°F (190°C).
Grease a 9×13-inch baking dish with olive oil or butter.
- Blanch the broccoli: Bring a pot of salted water to a boil. Cook broccoli florets for 2 minutes, then drain and rinse under cold water. Pat dry so the casserole doesn’t get watery.
- Season the shrimp: Pat shrimp dry.
Toss with a pinch of salt, pepper, and half the paprika. Dry shrimp sear better and keep a firm bite.
- Sauté the shrimp: In a large skillet, melt 1 tablespoon butter over medium-high heat. Add shrimp in a single layer and cook 1–2 minutes per side until just pink.
Remove to a plate. Do not overcook—they’ll bake again.
- Build the sauce base: Lower heat to medium. Add remaining butter to the skillet with minced garlic.
Cook 30 seconds until fragrant, not browned.
- Add the cream and cream cheese: Pour in heavy cream and whisk in cream cheese until smooth and slightly thickened, 2–3 minutes.
- Season and melt the cheeses: Stir in onion powder, remaining paprika, crushed red pepper, lemon zest, half the cheddar, and the Parmesan. Simmer gently, stirring, until melted and creamy. Taste and adjust salt and pepper.
- Assemble the casserole: Spread broccoli in the prepared dish.
Nestle shrimp evenly over the top. Pour the cheese sauce all over, letting it settle into the gaps.
- Top and bake: Sprinkle remaining cheddar on top. Bake 12–15 minutes until bubbling at the edges and lightly golden.
- Rest and garnish: Let it stand 5 minutes to set.
Finish with chopped parsley or chives for freshness. Serve warm.
Keeping It Fresh
Leftovers keep well when stored properly. Let the casserole cool, then transfer to airtight containers.
Refrigerate for up to 3 days. Reheat gently in a 300°F (150°C) oven, covered, until warmed through. You can also reheat individual portions in a skillet over low heat with a splash of cream to bring back the silkiness.
Freezing is possible, but shrimp can toughen; if you plan to freeze, slightly undercook the shrimp before baking.
Why This is Good for You
This casserole is built for a keto lifestyle. It’s high in protein from shrimp and rich in healthy fats from cream and cheese, which help keep you full. Broccoli adds fiber, vitamin C, vitamin K, and antioxidants.
You avoid refined carbs and get steady energy without spikes. It’s comfort food that still supports your goals.
Common Mistakes to Avoid
- Overcooking the shrimp: Shrimp turn rubbery fast. Cook them just until pink on the stove; the oven will finish the job.
- Skipping the broccoli dry step: Wet broccoli leaks moisture and makes the sauce thin.
Blanch, chill, and pat dry.
- Boiling the cream sauce: A hard boil can break the sauce. Keep it at a gentle simmer and whisk steadily.
- Using pre-shredded cheese only: Pre-shredded cheese contains anti-caking starches. For the smoothest sauce, grate at least some cheese fresh.
- Under-seasoning: Taste as you go.
Shrimp and broccoli are mild; salt, pepper, and lemon zest make the flavors pop.
Variations You Can Try
- Spicy Cajun: Swap paprika for Cajun seasoning, add extra red pepper, and finish with green onions.
- Bacon boost: Crisp 3–4 slices of bacon, crumble, and fold into the sauce for smoky richness.
- Mushroom and spinach: Sauté sliced mushrooms in butter, add a handful of baby spinach, and stir into the sauce before baking.
- Dairy-light tweak: Use half the cheddar and add more Parmesan for a sharper, lighter feel. You can also replace some cream with unsweetened almond milk and thicken longer.
- Lemon-herb: Add extra zest and a tablespoon of fresh dill or basil for a bright, springy vibe.
- Extra-crispy top: Mix grated Parmesan with crushed pork rinds and a drizzle of olive oil. Sprinkle over the cheddar before baking.
FAQ
Can I use frozen shrimp?
Yes.
Thaw completely in the fridge, then pat very dry before cooking. Excess moisture makes the casserole watery and prevents proper browning.
What can I use instead of broccoli?
Broccolini, cauliflower, or a mix of both work well. Keep florets bite-sized and blanch briefly so they stay crisp-tender.
Is this casserole spicy?
It has mild warmth if you use crushed red pepper.
For no heat, skip it. For more heat, add cayenne or use a spicy seasoning blend.
Can I make it ahead?
You can assemble it up to the point of baking, cover, and refrigerate for up to 24 hours. Add 5–7 extra minutes to the bake time if starting cold.
How do I keep the sauce from getting grainy?
Use low to medium heat, whisk often, and add cheeses gradually.
Grating your own cheese helps it melt smoothly without clumping.
What’s a good side dish?
A simple green salad with lemony vinaigrette, sautéed zucchini, or roasted asparagus keeps the meal light and balanced.
Can I add more protein?
Yes. Fold in bits of cooked bacon or diced, fully cooked chicken. Keep total volume similar so the sauce-to-filling ratio stays creamy.
How many carbs are in a serving?
Exact numbers vary with brands and portions, but expect roughly 6–8g net carbs per serving when divided into six portions.
Check your labels and adjust cheeses and broccoli to your target.
In Conclusion
Keto Shrimp and Broccoli Casserole brings comfort and ease to your low-carb routine. It’s creamy, savory, and full of texture, yet quick enough for a busy weeknight. With a few smart steps—drying the broccoli, gently cooking the shrimp, and whisking a smooth sauce—you’ll get reliable, restaurant-worthy results.
Keep the base the same, swap in your favorite seasonings, and enjoy a cozy meal that fits your goals.
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