This rainbow trout baked in foil is an easy, flavorful weeknight dinner that comes together in about 25–30 minutes. The prep is minimal and most of the cooking time is hands-off, making it simple to prepare a side while the fish cooks. Serve with sautéed greens or roasted potatoes for a satisfying meal.
How to Cook Trout Fillets in Foil
Baking trout in foil locks in moisture and concentrates the flavors from spices, garlic and lemon. The technique is the same whether you use rainbow trout, cod or snapper: season the fillet, coat it with a spiced oil, top with citrus, seal in foil and roast until just cooked through.
Start by patting a rainbow trout fillet dry with paper towels and seasoning it generously with salt and pepper. Place the fillet on a large sheet of aluminium foil so you can form a tight packet for baking.
In a small bowl, combine ground cumin and smoked paprika. These two spices pair wonderfully, but if you only have one of them or prefer sweet paprika, the dish will still be delicious. Grate in a clove of garlic and add about one tablespoon of extra virgin olive oil. Stir to make a smooth spiced oil.
Coating the spices in oil helps them release their aroma and flavor while the fish cooks. Spread the spiced oil evenly over the entire fillet so each bite is well seasoned.
Top the fillet with thin lemon slices so the citrus steams into the fish, brightening the flavors. I like to cover the whole fillet with lemon to ensure even flavor distribution.
Crimp the foil tightly around the trout to form a sealed packet and place it on a baking sheet. Preheat the oven to 180°C / 350°F and slide the baking sheet into the oven.
Bake the trout for about fifteen minutes, but rely on an instant-read thermometer for best results. Insert the thermometer through the foil into the thickest part of the fillet; the fish is ready when it reaches 50°C / 125°F. Cooking time will vary with fillet thickness, so temperature is the most reliable indicator of doneness.
When the trout reaches the target temperature, remove it from the oven and let it rest inside the foil for five minutes. This resting period lets the juices redistribute so the fillet stays moist. After resting, open the foil, remove the lemon slices and transfer the fish to serving plates.
Serve the trout with lemon wedges to squeeze over the top and pair it with quick sides such as sautéed kale and chard or roasted sweet potatoes. The foil method is speedy and delivers tender, flavorful fish with very little effort.
Rainbow Trout Baked in Foil
Ingredients
- 1 rainbow trout fillet about 300–350g (10.5–12oz)
- 1 tsp ground cumin
- 1 tsp smoked paprika (or sweet paprika)
- 1 clove garlic grated
- 1 lemon thinly sliced
- Lemon wedges for serving
Instructions
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Preheat oven to 180°C / 350°F. Pat the trout fillet dry and place it on a large piece of aluminium foil. Season generously with salt and pepper.
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In a small bowl, mix the cumin, smoked paprika and grated garlic. Stir in 1 tablespoon extra virgin olive oil until combined to form a spiced oil.
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Spread the spiced oil evenly over the fillet, making sure it is completely coated.
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Top with lemon slices, seal the foil tightly and place the packet on a baking sheet. Bake until an instant-read thermometer inserted through the foil into the thickest part reads 50°C / 125°F, about 15 minutes depending on thickness. Let rest in the foil for 5 minutes before opening and serving with lemon wedges.
Notes
Nutrition
This rainbow trout baked in foil is a quick, low-effort way to enjoy a flavorful fish fillet any night of the week.
Looking for a variation or have a question about the recipe? Leave a comment to let me know.
