Grilled Colorado Rainbow Trout with Lemon-Herb Butter

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

Fresh trout grilled to perfection and topped with a zesty lemon-herb butter that enhances its natural flavors. This American-inspired seafood recipe, ready in about 27 minutes, pairs whole rainbow trout, cleaned and gutted, unsalted butter, fresh lemon juice for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 320 calories and feeds 4, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 15 min Cook: 12 min Serves 4 American cuisine 320 cal/serving
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Ingredients

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Instructions

  1. Step 1: Preheat your grill to medium-high heat (about 400°F). Pat dry 2 whole rainbow trout (about 1 lb each) and season inside and out with 1 tsp salt and 1/2 tsp black pepper.
  2. Step 2: In a small bowl, combine 4 tbsp unsalted butter, 2 tbsp fresh lemon juice, 2 tbsp finely chopped fresh parsley, 1 tbsp fresh thyme leaves, and 2 minced garlic cloves. Mix well until smooth.
  3. Step 3: Brush the outside of each trout with 2 tbsp olive oil to prevent sticking. Place lemon slices inside the cavity of each trout along with a spoonful of the lemon-herb butter mixture.
  4. Step 4: Grill the trout over direct heat for 5-6 minutes per side, gently flipping once, until the skin is crispy and the flesh flakes easily with a fork.
  5. Step 5: Remove the trout from the grill, spoon remaining lemon-herb butter over the top while hot, and serve immediately with additional lemon wedges if desired.

Frequently asked questions

How long does Grilled Colorado Rainbow Trout with Lemon-Herb Butter take to make?

Total time is about 27 minutes (15 min prep + 12 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Grilled Colorado Rainbow Trout with Lemon-Herb Butter?

Refrigerate in a covered airtight container for up to 3–4 days (FDA FoodKeeper guideline for cooked fish). Store any fresh salsa or citrus-based garnish in a separate container — it keeps for up to 2 days. Freeze cooked fish (without fresh garnishes) for up to 3 months; thaw overnight in the fridge and reheat gently at 275°F until just warmed through to preserve texture.

Can I substitute ingredients in Grilled Colorado Rainbow Trout with Lemon-Herb Butter?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Grilled Colorado Rainbow Trout with Lemon-Herb Butter for a different number of people?

The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

What goes well with Grilled Colorado Rainbow Trout with Lemon-Herb Butter?

American seafood like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.

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