Instant Pot Butter-Poached Mahi-Mahi

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recipe by From Freezer to Instant Pot Cookbook

  • Time icon
    Total Time
  • Serves icon
  • Calories icon

This recipe is the only “PiP” (that is, in Instant Pot terminology, “pot in pot”) recipe in this book. We found that technique too fussy for a book about getting dinner on the table straight from the freezer. However, in this one case, our last recipe, we felt the extra step was warranted because mahi-mahi is a thicker, meatier fish and takes longer to cook. It’s also expensive and we wanted to make sure the fish remains moist and delicate. When the fillets were set right on the cooker’s bottom or even in a rack, they tended to turn mushy, given the time the pot needs to stay under pressure to thaw and cook the fish. Watch the size of the frozen fillets. They must lie flat in a 7-inch baking dish. Beyond • If desired, substitute four frozen 6-ounce, 5- or 6- inch-long halibut or tilapia fillets for the mahi-mahi. • This dish is great over a bed of steamed asparagus (particularly with all that butter sauce).

Inspired by:

recipe updated Jun 8, 2020


  • Black pepper icon
    Black pepper
    ½ tsp (about 1.07 g)
  • Paprika icon
    ½ tsp (about 1.07 g)
  • Onion powder icon
    Onion powder
    ½ tsp (about 1.33 g)
  • Salt icon
    ½ tsp (about 3 g)
  • Water icon
    1 ½ cups (about 360 g)
  • Frozen skinless mahi-mahi fillets icon
    Frozen skinless mahi-mahi fillets
    681 g (about 2 ¾ cups)
  • Butter icon
    ½ cup (about 115.2 g)


  • kCook icon Instant Pot
  • kCook icon Small bowl
  • kCook icon Rack
  • kCook icon Serving plate
  • kCook icon Baking dish - 2 quart
  • kCook icon Inner pot

Step preview

  1. Add paprika, onion powder, salt and black pepper to a clean small bowl
  2. Mix with tablespoon until well combined
  3. Add water to the inner pot
  4. Place a clean rack in the inner pot
  5. Add frozen skinless mahi-mahi fillets to a clean baking dish
  6. Sprinkle spices over fish evenly
  7. Place butter on the fish
  8. Set baking dish on the rack
  9. Close and lock the lid and turn the steam release handle to Sealing
  10. Pressure cook - Manual, High, 8 min
  11. Release pressure -
  12. Set onto work surface
  13. Transfer fish to serving plate
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