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A white plate with white fish over vegetables in a butter sauce.
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How to Make Butter Poached Fish (Recipe with Video)

This Butter Poached Fish recipe will teach you everything you need to know for how to poach fish in butter, which is actually really simple. The fish is delicate, rich and so delicious.
Prep Time: 10 minutes
Cook Time: 30 minutes
Total Time: 40 minutes
Servings: 4 servings
Calories: 550kcal

Ingredients

  • ¼ cup dry white wine
  • 14 tablespoons good quality salted butter
  • 1 clove garlic smashed
  • 1 sprig fresh thyme
  • 4 cups assorted vegetables such as carrots baby potatoes and/or zucchini*
  • 4 6- ounce skinless firm white fish fillets such as barramundi, cod, halibut, sea bass or grouper
  • salt and pepper
  • flaky sea salt for serving
  • Minced fresh parsley for serving
  • Lemon wedges for serving (optional)

Instructions

  1. Preheat the oven to 350 degrees.
  2. Pour white wine into a large sauté pan with high sides and place over medium-low heat. Add the butter, garlic, and thyme, then swirl the pan around and allow the butter to slowly melt.
  3. Add the vegetables, then gently toss to coat with butter. Poach for about 5 minutes, then use a slotted spoon to transfer the vegetables to a roasting pan and finish cooking in the oven (leave the garlic and thyme behind). Cook-time will vary depending on the vegetables and their size. Check after 10 minutes - they’ll be done when a fork can easily pierce the center.
  4. Carefully place the fish fillets in the butter. Season with salt and pepper, then swirl the pan around so butter coats the top of each fillet. Adjust the heat to keep the butter just below a simmer in order to prevent it from breaking. Allow the fish to poach slowly until it becomes opaque. Thicker fillets may be flipped over to finish cooking on the other side.
  5. Spoon vegetables on to a plate, then carefully place a barramundi fillet over top. Drizzle some of the butter sauce around the plate, then sprinkle the fish with flaky sea salt and parsley. Serve with lemon wedges on the side if desired.

Notes

  • Pat fish dry with a paper towel before placing in the poaching liquid.
  • Don’t let the butter boil. Keep it just below a simmer.
  • The fish is done when it becomes opaque. If you prefer a more concrete way to know when it's safe to eat, the internal temperature on an instant-read thermometer will be 145 degrees F in the thickest part of the fish.
  • Leftover butter may be frozen and used to poach fish again at a later date.
  • *A number of different vegetables work well with this preparation. Try broccoli, cauliflower, green beans, asparagus, parsnips, winter squash, radishes, turnips, or your favorite vegetable. Root vegetables may require a bit more time in the oven.  
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Nutrition

Calories: 550kcal | Carbohydrates: 25g | Protein: 21g | Fat: 42g | Saturated Fat: 26g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 11g | Trans Fat: 2g | Cholesterol: 141mg | Sodium: 438mg | Potassium: 627mg | Fiber: 7g | Sugar: 0.2g | Vitamin A: 10478IU | Vitamin C: 20mg | Calcium: 68mg | Iron: 2mg
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