Low-Carb Creamy Keto Cod with Roasted Red Pepper Sauce

The jar of roasted red peppers sat in my fridge for almost two weeks. I kept looking at it every time I opened the door, thinking, “I should do something with that.” But life gets busy, you know? Between work and everything else, it just kept getting pushed to the back. Then came one of those nights where I stared into the fridge, totally uninspired. Chicken again? Nah. Ground beef? Not feeling it. Then my eyes landed on those beautiful red strips in the jar, and a bag of frozen cod fillets in the freezer. Honestly, I wasn’t sure it would work. I just started blending.

That first bite was a genuine surprise. The sauce was silky and rich with this deep, smoky sweetness from the peppers, and it coated the flaky cod perfectly. No heavy cream, no complicated roux, just pure, creamy flavor. My husband walked in and asked what smelled so good, and I couldn’t even answer because I was too busy taking another bite. I knew right then this creamy keto cod with roasted red pepper sauce was going to be a regular thing in our house. It turned a random Tuesday into something that felt special without any of the stress.

This is the kind of meal that makes you feel like you’re cheating on your diet, but you’re absolutely not. It’s rich, satisfying, and comes together in under thirty minutes. If you’ve been looking for a keto dinner that doesn’t feel like a compromise, this is it.

Why You’ll Love This Recipe

I’ve made this creamy keto cod more times than I can count, and every single time, I’m amazed at how something so simple can taste so luxurious. Here’s why this recipe stands out from all the other fish dishes out there.

• Quick & Easy: From start to finish, you’re looking at about 25 minutes. Perfect for those nights when you need dinner on the table fast but still want something impressive.
• Simple Ingredients: No weird keto substitutes or hard-to-find items. Most of this stuff is probably already in your pantry or fridge.
• Incredibly Creamy Without Dairy: The sauce gets its velvety texture from blended roasted red peppers and a touch of coconut cream. You won’t miss the heavy cream at all.
• Perfect for Meal Prep: The sauce keeps beautifully, and the cod reheats surprisingly well. Make a double batch and thank yourself later.
• Low-Carb & Keto-Friendly: With less than 5 grams of net carbs per serving, this fits perfectly into your macros without feeling restrictive.

What makes this recipe different? It’s the sauce, honestly. Most creamy keto sauces rely on heavy cream or cheese, which can get heavy and sometimes break. This roasted red pepper sauce is naturally creamy, packed with flavor, and stays smooth even when reheated. The first time I made it, I couldn’t believe there was no dairy in there. It’s become my go-to for impressing guests who think keto food is boring.

This isn’t just another fish recipe. It’s the kind of meal that makes you look forward to eating healthy. The kind where you close your eyes after the first bite and just enjoy the moment. That’s what good food should do, right?

What Ingredients You Will Need

This recipe uses simple, wholesome ingredients that come together to create something truly special. Most of these are pantry staples or easy to find at any grocery store.

For the Cod:

• 4 cod fillets (about 6 ounces each) – Look for firm, white fillets with a mild scent. Fresh is great, but frozen works perfectly too. Just thaw them completely and pat them dry before cooking.
• 2 tablespoons olive oil – A good quality extra virgin olive oil adds flavor, but regular works fine too.
• 1 teaspoon salt – I prefer kosher salt for its clean taste and easy pinch-ability.
• ½ teaspoon black pepper – Freshly ground is always better here.
• ½ teaspoon garlic powder – Adds a subtle savory note without burning like fresh garlic would.
• ½ teaspoon paprika – Smoked paprika takes this to another level if you have it.

For the Roasted Red Pepper Sauce:

• 1 jar (12 ounces) roasted red peppers, drained – I love the brand Divina, but any good-quality jarred variety works. Avoid the ones packed in vinegar-heavy brine if you can.
• ½ cup coconut cream – This is the thick part from a can of full-fat coconut milk. Chill the can overnight and scoop off the top. For a non-coconut option, use heavy cream if you’re not dairy-free.
• 2 cloves garlic, minced – Fresh garlic really shines here, but ½ teaspoon of garlic powder works in a pinch.
• 2 tablespoons olive oil – Helps emulsify the sauce and adds richness.
• 1 tablespoon lemon juice – Fresh squeezed is non-negotiable here. Bottled stuff tastes flat.
• ½ teaspoon salt – Adjust to taste depending on how salty your peppers are.
• ¼ teaspoon red pepper flakes – Optional, but gives a nice little kick.
• ¼ cup chicken or vegetable broth – Thins the sauce to the perfect consistency. Use a good quality broth for best flavor.

For Garnish (Optional but Recommended):

• Fresh parsley or basil, chopped – Adds color and freshness.
• Lemon wedges – A squeeze right before eating brightens everything up.

One thing I’ve learned – don’t skip patting the cod dry. Wet fish won’t get that beautiful golden sear, and you’ll end up with steamed fish instead of perfectly pan-seared fillets. Also, if you’re watching your carb intake, check the label on your roasted red peppers. Some brands add sugar, so look for ones without added sweeteners.

Equipment Needed

You don’t need a fancy kitchen to pull this off. Here’s what you’ll need:

• Large skillet or frying pan – A 12-inch non-stick or cast iron skillet works best. I use my trusty cast iron because it holds heat so well and gives the cod a gorgeous crust.
• Blender or food processor – This is essential for getting that silky smooth sauce. I’ve used both, and honestly, a high-speed blender gives the creamiest result. My Vitamix handles it in about 30 seconds flat.
• Spatula or fish turner – A thin, flexible spatula makes flipping delicate fish fillets so much easier. Trust me, a regular spatula can break the fish apart.
• Cutting board and sharp knife – For mincing garlic and chopping herbs.
• Measuring spoons and cups – Precision matters, especially with keto cooking.
• Paper towels – For patting the fish dry. This step really does make a difference.

If you don’t have a blender, an immersion blender works too, but you’ll need a tall container to avoid splatters. And if you’re using a food processor, blend a little longer than you think you need to – you want that sauce completely smooth.

Preparation Method

Let’s get cooking! This comes together faster than you’d think, so have everything prepped and ready to go.

1. Start with the sauce. Drain the roasted red peppers and add them to your blender along with the coconut cream, minced garlic, olive oil, lemon juice, salt, red pepper flakes (if using), and chicken broth. Blend on high until completely smooth. This should take about 30 to 45 seconds. Taste it and adjust the salt or lemon juice as needed. Set the sauce aside while you cook the fish.
2. Prep the cod. Pat each fillet dry with paper towels. This is crucial – moisture is the enemy of a good sear. Season both sides generously with salt, pepper, garlic powder, and paprika. Let them sit at room temperature for about 5 minutes while your pan heats up.
3. Heat the skillet. Place your skillet over medium-high heat and add the olive oil. Let it get hot – you want it shimmering but not smoking. A drop of water should sizzle immediately when it hits the pan.
4. Sear the cod. Carefully place the fillets in the hot skillet, presentation side down (that’s the side that looks prettier). Don’t crowd the pan – cook in batches if needed. Let the fish cook undisturbed for 4 to 5 minutes. You’ll know it’s ready to flip when the edges look opaque and the bottom is golden brown. Gently flip each fillet using your thin spatula. Cook for another 3 to 4 minutes, depending on thickness. The fish should flake easily with a fork and be opaque all the way through.
5. Warm the sauce. While the fish finishes cooking, pour the roasted red pepper sauce into a small saucepan and warm it over low heat. Stir occasionally. Don’t let it boil – you just want it heated through.
6. Bring it together. Once the cod is cooked, transfer it to a plate or serving platter. Pour the warm sauce over the top, or serve it on the side if you prefer. Garnish with fresh herbs and lemon wedges.

One thing I learned the hard way – don’t move the fish around in the pan while it’s searing. Just let it sit and do its thing. If you try to flip it too early, it’ll stick and fall apart. Be patient, and that beautiful golden crust will release on its own when it’s ready.

If your fillets are different thicknesses, the thinner ones will cook faster. Keep an eye on them and remove them from the pan as they finish. A good rule of thumb is to cook fish for about 8 to 10 minutes per inch of thickness.

Cooking Tips & Techniques

After making this creamy keto cod probably a dozen times, I’ve picked up a few tricks that make a real difference.

Getting the perfect sear. The biggest mistake I see is people not drying their fish enough. I use three or four paper towels and really press them into the flesh. Then I let the fillets sit uncovered in the fridge for 10 minutes if I have time. That extra drying time makes the skin (or flesh) extra dry, which means an incredible golden crust.

Don’t skip the room temperature step. Taking the chill off the fish before cooking helps it cook more evenly. Cold fish straight from the fridge will cook unevenly – the outside might be done while the center is still cold and raw. Let it sit out for 10 to 15 minutes before cooking.

Making the sauce ahead. This sauce is a lifesaver. I often make a double batch and keep it in the fridge for up to a week. It’s amazing on chicken, spooned over roasted vegetables, or even used as a dip for garlic mushrooms and cauliflower skillet. The flavors actually get better after a day or two in the fridge.

Fixing a broken sauce. If your sauce separates or looks grainy, don’t panic. Just pour it back into the blender with a tablespoon of warm water or broth and blend for 20 seconds. It’ll come back together smooth as ever.

Timing is everything. Start your sauce first, then cook the fish. That way everything is ready at the same time. I’ve made the mistake of cooking the fish first and then rushing the sauce, and the fish got cold. Not ideal. Get your sauce blended and warming while you sear the fish, and you’ll have a perfectly timed meal.

One more thing – if you’re new to cooking fish, don’t be afraid to use a thermometer. Cod is perfectly cooked at 145°F. It takes the guesswork out completely.

Variations & Adaptations

One of the best things about this recipe is how adaptable it is. Here are some of my favorite variations.

Different fish options. This sauce works beautifully with almost any white fish. I’ve used halibut, haddock, and even tilapia with great results. For a heartier option, try salmon – the rich fish pairs surprisingly well with the smoky pepper sauce. Just adjust cooking times based on thickness.

Dairy-free version. This recipe is already dairy-free if you use coconut cream. But if you’re not a fan of coconut, try using cashew cream instead. Soak ½ cup of raw cashews in hot water for 30 minutes, drain, and blend with the sauce ingredients. It’s incredibly creamy with zero coconut flavor.

Spicy kick. If you like heat, add a whole chipotle pepper in adobo sauce to the blender. It adds a smoky, deep heat that’s absolutely incredible. Start with one and taste – you can always add more.

One-pan meal. To make this a complete meal, add some asparagus spears or zucchini noodles to the pan after you remove the fish. Sauté them in the pan drippings for 3 to 4 minutes, then serve everything together. It’s a complete dinner in one pan with minimal cleanup.

Herb swap. Not a fan of parsley? Try fresh basil, dill, or chives. Each one brings a different personality to the dish. Dill is especially good with the roasted pepper flavor – it’s unexpected but works beautifully.

I once made this for a friend who swore she hated fish. She asked for the recipe before she finished her plate. That’s the power of a really good sauce, I guess.

Serving & Storage Suggestions

This creamy keto cod is beautiful on its own, but here’s how to make it a complete meal.

Serving suggestions. I love serving this over a bed of sautéed spinach or zucchini noodles. The sauce acts like a light, flavorful dressing that coats everything perfectly. For a heartier meal, try it with quinoa enchilada casserole for a fun flavor contrast, or keep it simple with steamed broccoli or roasted asparagus. A side of cauliflower rice soaks up that extra sauce beautifully – don’t waste a drop!

Temperature matters. Serve the cod hot, right after cooking. The sauce should be warm but not boiling. A squeeze of fresh lemon juice right before serving brightens all the flavors and cuts through the richness.

Storing leftovers. Store any leftover cod and sauce separately in airtight containers in the fridge. The cod will keep for 2 to 3 days, and the sauce stays good for up to a week. The flavors in the sauce actually deepen and get even better after a day.

Reheating. The best way to reheat the cod is gently. Place it in a skillet with a splash of water or broth, cover, and warm over low heat for 3 to 4 minutes. The microwave works too, but go in 30-second bursts on low power to avoid drying it out. Reheat the sauce in a small saucepan over low heat, stirring occasionally.

Freezing. The sauce freezes beautifully for up to 3 months. Pour it into a freezer-safe bag or container and thaw overnight in the fridge. The cod itself doesn’t freeze as well after cooking – the texture gets a bit mushy. So I recommend freezing just the sauce and making fresh cod when you’re ready to serve.

Nutritional Information & Benefits

Here’s the nutritional breakdown for one serving of creamy keto cod with roasted red pepper sauce (based on 4 servings):

Nutrient	Amount Per Serving
Calories	320
Total Fat	22g
Saturated Fat	8g
Protein	28g
Total Carbohydrates	7g
Fiber	2g
Net Carbs	5g

Cod is an excellent source of lean protein and packed with essential nutrients like vitamin B12, iodine, and selenium. It’s also rich in omega-3 fatty acids, which support heart and brain health. The roasted red peppers are loaded with vitamin C and antioxidants, especially lycopene, which becomes more bioavailable when cooked. Coconut cream provides healthy medium-chain triglycerides (MCTs) that can support energy and ketone production.

This meal is naturally gluten-free, dairy-free, and low in carbs, making it suitable for keto, paleo, and whole30 diets. It’s also nut-free and egg-free. The only potential allergen is fish, so just be mindful if you’re serving someone with a seafood allergy.

I love that this recipe lets me enjoy a rich, satisfying dinner without any of the guilt or carb crash. It’s proof that healthy eating doesn’t have to mean boring or bland.

Conclusion

This creamy keto cod with roasted red pepper sauce has honestly become one of my most-requested recipes. Friends ask for it, family requests it for dinner, and I never get tired of making it. There’s something so satisfying about blending simple ingredients into a sauce that tastes like it came from a fancy restaurant.

I hope you give this a try and make it your own. Add more spice if you like heat, swap in your favorite white fish, or double the sauce and keep it in the fridge for quick weeknight dinners. The beauty of cooking at home is that you get to decide what works for you and your family.

If you make this, I’d love to hear how it turned out! Drop a comment below and let me know if you tried any fun variations. And if you’re looking for another easy, satisfying dinner, don’t miss my creamy lemon dill salmon pasta – it’s another weeknight hero. Happy cooking, friends!

Frequently Asked Questions

Can I use frozen cod for this recipe?

Absolutely! Just make sure to thaw the fillets completely in the refrigerator overnight. Pat them very dry with paper towels before seasoning and cooking. Frozen fish tends to release more water, so drying is extra important here.

What can I substitute for coconut cream?

If you’re not dairy-free, heavy cream works perfectly. For another dairy-free option, try full-fat canned coconut milk (just use the thick part) or cashew cream. Each will give a slightly different flavor, but all are delicious.

How do I know when the cod is fully cooked?

Cod is done when it flakes easily with a fork and is opaque all the way through. For the most accurate result, use an instant-read thermometer – it should read 145°F at the thickest part. The fish will also feel firm to the touch but still have a little give.

Can I make the sauce ahead of time?

Yes, and I actually recommend it! The sauce keeps beautifully in the fridge for up to a week. Make a double batch and use it on chicken, vegetables, or even as a dip. The flavors get even better after a day or two.

Is this recipe spicy?

As written, it has a very mild warmth from the red pepper flakes, but it’s not spicy at all. The roasted red peppers are sweet and smoky, not hot. If you want heat, add a chipotle pepper or extra red pepper flakes to the sauce. You can also leave the red pepper flakes out entirely for a completely mild version.

Print