Wild Trout Almondine: Pan-Seared Wyoming Trout with Brown Butter and Toasted Almonds

The Day I Had Fillets Instead of a Whole Fish

A few weeks back I posted my grilled Wyoming trout with lemon herb butter, and the whole point of that recipe is the drama of cooking a fish whole — head, tail, the works, right over the coals. I love that version. But not every trout dinner starts that way, and not every cook wants to wrestle a whole fish.

Here’s the situation that produced this recipe. I’d had a good morning on the North Platte, fishing the stretch below Gray Reef where the water runs cold and quick even in late spring. I’d waded out before the sun cleared the bluffs, and by mid-morning I had a small cooler of rainbows and a couple of browns. There’s a particular kind of quiet on that river early — just the current, the occasional truck up on the road, and the sound of line peeling off the reel. I came home happy, set up at the cleaning table I keep on the back patio, and went to work.

Filleting trout is its own small meditation. I run the knife in behind the gill plate, angle down to the spine, and follow the bone back to the tail in one long stroke. Flip, repeat, and you’ve got two clean sides off each fish. By the time I’d worked through the cooler I had a stack of fillets sitting on a sheet pan, glistening pink, the kind of haul that makes the early alarm worth it. Kimi looked at them and said, more or less, “do something French with those.” She grew up cooking, she’s the better cook in this house, and when she points me in a direction I usually listen. So I reached for the oldest trick in the book: almondine.

If you’ve only ever cooked trout whole on the grill, this is going to feel like a completely different animal — and that’s the point. This is a stovetop, fillet-based dish built on a classic French technique, where the whole-grilled approach in that other post is rustic and hands-off. Different pan, different method, different result. If you’ve got fillets in the fridge instead of a whole fish, or you just don’t feel like firing up the grill on a weeknight, this is the one you want.

Jump to Recipe

Trout almondine has become my default move when I want something that tastes like I tried hard but actually took fifteen minutes of real work. Crisp-edged fillets, a nutty brown butter, almonds toasted until they smell like a bakery, a hit of lemon to wake the whole thing up. It is, hand on heart, one of the best things you can do with a Wyoming trout.

I’ll be honest — back in my Army days, “cooking fish” meant whatever came out of a foil pouch or off a sketchy diner griddle. Moving to Wyoming in 2022 changed all of that. Suddenly I was twenty minutes from blue-ribbon trout water, and a fish I’d caught that morning was on the table by that evening. Once you’ve eaten trout that fresh, cooked simply, you stop reaching for the complicated stuff. This recipe is a product of that lesson: let a great ingredient be the star, and get out of its way.

What “Almondine” Actually Means (and Why Brown Butter Is the Secret)

If you’ve seen “amandine” or “almondine” on a menu and assumed it was fancy, here’s the plain-English version. Almondine just means “garnished with almonds.” It’s a French preparation — à la amandine — most famously done with sole or trout, where you sear the fish, build a butter sauce in the same pan, and finish it with toasted sliced almonds. The American spelling drifted to “almondine,” but it’s the same dish your great-aunt might have ordered at a supper club in 1975. It earned its reputation honestly.

The classic version is truite amandine, trout almondine, and it’s been a French bistro staple for well over a century. The dish made its way across the Atlantic and landed hard in mid-century American supper clubs and hotel dining rooms — that golden era when a plate of fish under butter and almonds, served with a wedge of lemon and a sprig of parsley, was the height of going out to dinner. It became one of those “continental cuisine” classics that showed up on every white-tablecloth menu from New Orleans to Chicago. The reason it stuck around isn’t nostalgia, though. It stuck around because it genuinely works. The technique is forgiving, the ingredient list is short, and the payoff — crisp fish, toasty nuts, rich butter, bright lemon — hits every note you want a plate of food to hit. Trends come and go, but a well-executed almondine never really left.

The thing that makes it sing isn’t the almonds, though — it’s the brown butter. When you melt butter and keep cooking it past the foaming stage, the milk solids toast and turn golden, and the butter develops this deep, nutty, almost caramel aroma. The French call it beurre noisette, “hazelnut butter,” because that’s exactly what it smells like even though there’s no hazelnut in it. Brown butter is one of those techniques that costs you nothing extra and makes people think you went to culinary school. Pair that toasty butter with toasty almonds and a clean, lean fish like trout, and you’ve got a dish where every element is pulling in the same direction.

Trout is the perfect fish for this because it’s mild, a little sweet, and delicate enough that it doesn’t fight the butter. Wyoming gives us some of the best trout water in the country, and a fresh-caught rainbow, brown, or brookie cooked this way tastes like the river it came from. If you’re working with store-bought, farmed rainbow trout works beautifully here too — no shame in it, and it’s available year-round.

Ingredients

Serves 2 (easily doubled for 4)

For the trout:

• 4 trout fillets (about 4-6 oz each), skin on or skinless — 2 whole fish worth
• Kosher salt and freshly ground black pepper
• 1/4 cup all-purpose flour, for dredging
• 2 tablespoons neutral oil (grapeseed, avocado, or canola)

For the almondine sauce:

• 4 tablespoons (1/2 stick) unsalted butter
• 1/2 cup sliced almonds
• 2 tablespoons fresh lemon juice (about 1 lemon)
• 2 tablespoons fresh parsley, chopped
• Pinch of salt
• Lemon wedges, for serving

A quick gear note before we start. The single most useful tool for this dish is a thin, flexible fish spatula — it slides under delicate fillets without tearing them, which a regular spatula will absolutely do. I also strongly prefer a stainless steel skillet here rather than non-stick, because you need to see the butter actually browning, and a light-colored non-stick surface hides the color you’re trying to read. If you’re cleaning your own fish, a good fillet knife makes the difference between four clean fillets and four sad, ragged ones. (As an Amazon Associate, I earn from qualifying purchases — it never costs you extra.)

How to Make Trout Almondine

Step 1: Dry and season the fillets

Pat the trout fillets completely dry with paper towels. This matters more than people think — wet fish steams instead of searing, and you’ll never get that golden crust. Season both sides with salt and pepper.

A word on your fillets before they hit the pan. If you cleaned your own fish, run a finger down the centerline of each fillet, against the grain, and feel for pin bones — those fine little bones that line the upper part of the fillet. On a trout this size they’re often soft enough to eat, but if you feel anything sharp, pull it out with a clean pair of needle-nose pliers or fish tweezers. Your guests will thank you. And if you’re buying fillets at the counter, give them a quick look and a sniff: good trout smells clean and faintly of the river or the sea, never “fishy.” A bright, firm fillet that springs back when you press it is what you want.

Step 2: Dredge in flour

Spread the flour on a plate and lightly coat each fillet on both sides, shaking off the excess. You want a thin, even dusting, not a thick batter. This light flour coat does two things: it gives you a crisp, golden exterior, and it gives the butter sauce something to cling to later. Skip it if you’re avoiding flour, but you’ll lose a little crispness.

Step 3: Sear the trout

Heat the oil in your skillet over medium-high heat until it shimmers. Lay the fillets in skin-side down (or presentation-side down if skinless), away from you so you don’t splash yourself. Don’t crowd the pan — work in two batches if you have to. Let them cook undisturbed for 2-3 minutes until the edges turn opaque and golden. Resist the urge to poke at them. Flip gently with your fish spatula and cook the second side for just 1-2 minutes. Trout is thin and cooks fast; the moment the flesh turns opaque and flakes, it’s done. Move the fillets to a warm plate.

Step 4: Toast the almonds

Pour off the oil and wipe the pan if it looks scorched, but keep those tasty browned bits. Lower the heat to medium and add the butter. Once it melts, add the sliced almonds. Stir more or less constantly — almonds go from raw to perfect to burnt in about thirty seconds, so don’t walk away. You’re toasting the almonds and browning the butter at the same time here, which is the whole trick.

Step 5: Brown the butter

Keep stirring as the butter foams, then quiets down, then starts to smell nutty and turn golden-brown around the almonds. This takes 2-4 minutes total. When you see flecks of golden-brown in the butter and the almonds are evenly toasted, you’re there. Pull it off the heat immediately — brown butter becomes burnt butter in seconds.

Here’s how to read the stages so you don’t blow it. First the butter melts and goes silent. Then it foams up loud and bubbly — that’s the water cooking off. When the foam starts to subside and the bubbling gets quieter, lean in: the smell shifts from plain butter to something toasty and nutty, almost like toffee. That’s your signal. The milk solids at the bottom of the pan are turning from pale to amber to deep gold, and that’s exactly the color you want. If you see them go from gold to dark brown and the smell turns sharp instead of sweet, you’ve gone a step too far. The fix isn’t a fix at all — once butter burns it’s bitter and there’s no rescuing it, so dump it, wipe the pan, and start the butter and almonds over. It only costs you a few minutes and another pat of butter, and it’s a far better outcome than acrid sauce over good fish. This is why I keep the heat at medium, not high: a slower brown gives you a wider window to catch it at the right moment.

A note on the fish doneness, since the two stages overlap. Trout fillets are thin — often well under an inch — which means they cook in a flash and overcook just as fast. The flesh turns from translucent to opaque and the flakes separate with the gentlest nudge of a fork. That’s done. If you’re staring at it wondering, it’s probably ready. Because the fish is resting on a warm plate while you build the sauce, it keeps cooking a little from residual heat, so pull it a hair early rather than a hair late.

Step 6: Finish the sauce and serve

Off the heat, stir in the lemon juice (it’ll sputter), the parsley, and a pinch of salt. The lemon cuts the richness and stops the butter from cooking further. Spoon the almonds and brown butter generously over the trout fillets, getting plenty of almonds on each piece. Serve right away with lemon wedges.

Tips for the Best Trout Almondine

• Skin-on vs. skinless: Either works. Skin-on gives you a crispy bonus and helps the fillet hold together — sear it skin-side down first and most of the cooking happens there. Skinless is a little more delicate to flip, so be gentle. If your skin is on, make sure it’s scaled.
• Toast the almonds with care. This is where almondine lives or dies. Sliced almonds are thin and turn from golden to bitter fast. Keep them moving and trust your nose — when the kitchen smells like toasted nuts, you’re done.
• Read the butter, don’t time it. Brown butter is about color and smell, not the clock. The second it smells nutty and turns the color of a hazelnut, it’s ready. Burnt butter is acrid and you can’t fix it.
• Don’t overcook the fish. Trout is lean and thin. It goes from perfect to dry quickly. Pull it when the flesh just turns opaque and flakes with gentle pressure — it’ll carry over a touch as it rests under the warm butter.
• Work in batches. A crowded pan steams instead of sears. Give each fillet room.
• Fresh lemon only. The bottled stuff tastes flat here, and this dish leans on that bright pop of acid to balance all the butter.

Variations Worth Trying

Almondine is a template as much as a recipe, and once you’ve got the technique down it’s fun to play with. A few directions I’ve taken it:

• Swap the nut. Sliced almonds are traditional, but toasted pine nuts, chopped hazelnuts, or even pecans all work beautifully in the brown butter. Pecans lean a little Southern and go great if you’re serving this with grits. Hazelnuts double down on the noisette idea, since brown butter already smells like them.
• Capers instead of (or alongside) almonds. If you want to push the dish toward a meunière or piccata feel, add a tablespoon of drained capers when you finish the sauce. They bring a briny pop that plays off the lemon. You can keep the almonds or drop them — both are good.
• Garlic and herbs. A clove of minced garlic dropped into the butter for the last thirty seconds of browning adds depth. Fresh thyme or chives can stand in for the parsley, or join it.
• Lemon-forward vs. mellow. Two tablespoons of lemon juice gives you a bright, acidic finish. If you like it gentler, cut it to one tablespoon and add a little lemon zest instead — you get the perfume without as much pucker.
• Other fish. This exact method works on any thin, mild, flaky fillet: walleye, sole, flounder, perch, even tilapia in a pinch. It’s the technique doing the heavy lifting, so use whatever clean fish you’ve got.

What to Serve With Trout Almondine

This is a rich dish, so I like to balance it with something simple and a little crisp. A pile of green beans or asparagus blanched and then tossed in the leftover brown butter is almost too easy — and it means none of that good butter goes to waste. Roasted baby potatoes, a wedge of crusty bread to mop the pan, or a sharp green salad with a lemon vinaigrette all work. In summer I’ll do grilled zucchini or yellow squash from the Casper farmers market alongside, charred at the edges, with nothing but salt and olive oil.

Rice pilaf is the old supper-club move, and it earns its place: a fluffy, buttery pilaf soaks up the almondine sauce like it was designed to. Wild rice does the same with a nuttier edge that echoes the almonds. If you want something cooling against all that butter, a cucumber salad or a few tomato slices with flaky salt does the trick. The guiding principle is contrast — the fish and sauce are rich and golden, so reach for sides that bring acid, freshness, or crunch.

For wine, a dry, unoaked white — Sauvignon Blanc, Pinot Grigio, an Albariño — matches the lemon and doesn’t fight the delicate fish. A dry rosé works in summer, and if you’d rather skip wine entirely, sparkling water with a squeeze of lemon keeps the whole meal feeling light.

If you’re building a whole fish-and-game spread, this slots right in next to my other water-to-table recipes. The pan-seared walleye uses a similar stovetop approach if you’ve got a different catch in the freezer, and if you’re cooking your way through a Wyoming season, my wild game season guide covers how I think about cooking everything the rivers and mountains hand us.

Storage & Reheating Leftovers

Honestly, almondine is best the moment it comes out of the pan — that’s when the fish is crisp and the butter is glossy. But leftovers happen.

Store cooled trout in an airtight container in the fridge for up to 2 days. I’d keep the almonds and butter in the same container; they’ll firm up but melt right back.

When reheating, go gentle — fish overcooks instantly under aggressive heat. The microwave will turn your trout to rubber. Instead, warm leftovers in a low oven (275°F) for about 8-10 minutes, or in a skillet over low heat just until warmed through. Add a fresh squeeze of lemon to wake it back up. I don’t recommend freezing cooked trout almondine; the texture suffers and the almonds go soft.

If you’ve got a little leftover trout and brown butter, flake it cold over a salad the next day — it’s a fantastic lunch and skips the reheating problem entirely.

Give It a Try

This is the recipe I reach for when I’ve got fillets and twenty minutes, and it never lets me down. It tastes like a restaurant dish and cooks like a weeknight one, which is about the best deal in the kitchen. Whether you caught your trout on a Wyoming river or grabbed it at the store, almondine treats it right.

If you make it, I want to see it. Tag @wyofood on Instagram or find Wyo Food on Facebook and show me your golden fillets and toasty almonds. And if you’re more of a fire-and-coals person, go give the grilled whole trout a try and tell me which version you like better. I genuinely want to know.

— Sean