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The Best Cod & Potatoes in Rosemary Cream Sauce

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Prep Time 10 minutes
Cook Time 25 minutes
Total Time 35 minutes
Servings 4

Ingredients
  

  • For the Main Dish
  • 4 cod fillets about 6 oz each, skinless and boneless
  • 1 lb baby potatoes or Yukon Golds halved
  • 2 tbsp olive oil
  • 1 tbsp butter
  • Salt and black pepper to taste
  • For the Rosemary Cream Sauce
  • 2 tbsp butter
  • 3 garlic cloves minced
  • 1 tsp fresh rosemary finely chopped (or ½ tsp dried)
  • 1 cup heavy cream
  • ½ cup chicken or vegetable broth
  • ½ cup grated Parmesan cheese
  • 1 tbsp Dijon mustard optional, for extra flavor
  • Juice of ½ lemon
  • Salt and pepper to taste
  • Optional Garnishes
  • Fresh parsley chopped
  • Extra rosemary sprigs
  • Lemon wedges for serving

Instructions
 

  • Prepare the Potatoes
  • Preheat oven to 400°F (200°C).
  • Toss halved potatoes with olive oil, salt, and pepper.
  • Roast 20–25 minutes, until golden and tender.
  • 💡 Boil instead of roast for a softer texture, but roasting adds flavor.
  • Sear the Cod
  • Pat cod fillets dry and season with salt and pepper.
  • Heat 1 tbsp olive oil and 1 tbsp butter in a skillet over medium-high heat.
  • Sear fillets 3–4 minutes per side, until golden and flaky.
  • Remove from skillet and set aside.
  • Make the Rosemary Cream Sauce
  • In the same skillet, melt 2 tbsp butter.
  • Add garlic and sauté 30 seconds until fragrant.
  • Stir in rosemary and cook another 30 seconds.
  • Pour in broth and cream, stirring to combine.
  • Bring to a gentle simmer.
  • Add Parmesan and Dijon mustard; whisk until slightly thickened (2–3 minutes).
  • Stir in lemon juice, then season with salt and pepper.
  • Combine and Serve
  • Add roasted potatoes to the sauce and toss gently.
  • Nestle cod fillets back into the skillet and spoon sauce over.
  • Simmer 2–3 minutes on low until warmed through.
  • Garnish with parsley and lemon wedges.

Notes

✅ Use fresh rosemary for the best flavor.
✅ Don’t overcook cod — it should flake easily but remain moist.
✅ For a lighter sauce: use half-and-half or evaporated milk.
✅ For extra richness: stir in a small knob of butter before serving.