Mar 28, 2026

Lapsang‑Infused Beurre Monté Sea Bass with Charred Fennel, Compressed Cucumber & Toasted Buckwheat Crunch

Overview

This is an elegant, restaurant‑style dish that juxtaposes delicate, flaky sea bass with an intensely aromatic sauce and three contrasting textures: tender charred fennel, icy compressed cucumber, and nutty toasted buckwheat crunch. The secret twist is a Lapsang Souchong–infused beurre monté: a quick, stable warm emulsion where butter is first gently clarified with smoky black tea, then emulsified into a lemony satin sauce that coats the fish without collapsing. The tea gives a deep, natural smoke aroma without a smoker; it’s subtle, complex and utterly addictive.

Serves 4.

Why this works (short)

The tea‑fat infusion delivers smoke without overpowering the fish.
Beurre monté yields a silkier, more stable finish than a beurre blanc.
Compressed cucumber provides bright acid and coolness to balance the warm, smoky butter.
Toasted buckwheat (kasha) adds a crunchy, almost coffee‑like note that echoes the tea.

Ingredients

For the fish and beurre monté

4 skin‑on sea bass fillets, 5–6 oz (140–170 g) each, pin bones removed, patted dry
10 tbsp (140 g) unsalted butter, cold and cubed
2 tsp Lapsang Souchong tea leaves (or 3 tea bags)
1 small shallot, finely minced
2 tbsp dry white wine
1 tbsp fresh lemon juice
1 tsp light soy sauce (for subtle umami)
Fine sea salt and freshly ground white pepper
2 tbsp neutral oil (grapeseed or avocado) for searing

For the charred fennel

2 medium fennel bulbs, trimmed and halved lengthwise
2 tbsp olive oil
1 tsp flaky sea salt
Zest of 1 lemon

For the compressed cucumber

1 English cucumber, halved lengthwise, seeded and cut into 1/4‑inch slices
2 tbsp rice vinegar
1 tsp sugar
1/2 tsp fine sea salt

For the toasted buckwheat crunch

3/4 cup raw buckwheat groats (kasha)
2 tsp unsalted butter
1/4 tsp flaky sea salt

Garnish

Microgreens or young dill
Thin lemon segments (supreme) or lemon oil drops

Equipment notes

Small saucepan with fine mesh strainer
Small blender or whisk
Cast‑iron skillet or heavy stainless pan
Vacuum bag and pump (optional) — for faster compressed cucumber, but a zip bag and weight work fine
Small skillet for toasting buckwheat

Mise en place (15–20 minutes)

Pat the fish dry, season lightly with salt and white pepper. Keep skin dry until searing.
Measure and cube the butter; keep chilled.
Make the tea‑clarified butter first (see next section).
Trim fennel and cucumber as listed.
Toast the buckwheat while preparing other elements.

The secret twist — Lapsang‑infused beurre monté (20 minutes)

This is the heart of the dish. The goal is a warm emulsion that carries smoke, citrus and umami.

In a small saucepan, add 4 tbsp of the butter and the Lapsang Souchong tea. Warm gently over low heat until butter melts and you can smell the tea — about 3–4 minutes. Do not boil.
Remove from heat and let steep, covered, 8–10 minutes.
Strain through a fine mesh into a clean small saucepan, pressing the tea leaves gently to extract aroma. Discard leaves.
Add the minced shallot and white wine to the strained butter pan. Bring to a very gentle simmer and reduce until only a tablespoon or two of liquid remains — this concentrates flavor but keeps the emulsion stable.
Add lemon juice and soy sauce. Keep warm over the lowest heat.
Remove the pan from direct heat. With a whisk (or an immersion blender on low), slowly add the remaining 6 tbsp cold butter, one cube at a time, whisking continuously to form a glossy, warm emulsion (beurre monté). If it splits, whisk in a teaspoon of cold water to rebind. Keep at about 60–65°C (140–149°F) — warm but not hot. Hold on very low heat, whisking occasionally.

Tip: Because the butter was clarified with tea, the emulsion carries a clean smoke note without any grit or tannin.

Toasted buckwheat crunch (5–7 minutes)

Heat a small dry skillet over medium.
Add buckwheat groats and toast, stirring constantly, until they smell nutty and a few pop — 3–4 minutes.
Add 2 tsp butter and continue to toast until butter coats the groats and they turn glossy. Remove to a plate, season with flaky salt and cool.

This delivers crisp, coffee‑like crunch that mirrors the tea.

Compressed cucumber (quick pickle compression — 30–60 minutes)

Whisk vinegar, sugar and salt until dissolved.
Toss cucumber slices in the dressing and place into a vacuum bag or heavy zip bag.
If using vacuum: remove air and vacuum the bag. If using zip bag: press out as much air as possible and seal.
Put a weight on the sealed bag (a plate with cans) and refrigerate 30–60 minutes. This compresses the cucumber, intensifies flavor and gives a glossy bite. Drain before plating.

If pressed for time, you can marinate 10–15 minutes and still get a bright result.

Charred fennel (10–12 minutes)

Heat a cast‑iron skillet or grill pan until very hot.
Rub fennel halves with olive oil and season with flaky salt.
Place cut side down on the hot pan and press with a second heavy pan or a brick wrapped in foil — this creates deep char lines and accelerates caramelization. Cook 3–4 minutes until darkly charred, then flip and cook 2–3 minutes more until tender but still a little bite.
Remove and shave a little lemon zest over the top.

This “pan‑press” method gives restaurant‑grade char without a grill.

Searing the sea bass (6–8 minutes)

Pat the fish skin very dry again. Score skin lightly if thick.
Heat a heavy skillet over medium‑high. Add neutral oil.
When oil shimmers, place fillets skin‑side down and press gently with a spatula for the first 30 seconds to prevent curling.
Cook skin‑side down until skin is deeply golden and crisp — 4–5 minutes depending on thickness.
Flip quickly and sear the top 30–60 seconds until the fish is just cooked through. Remove and rest 1 minute.

Season lightly with flaky salt.

Assembly & plating

Warm the Lapsang beurre monté gently and whisk to revive. Keep warm but not hot.
On each plate, spoon a small pool of beurre monté where the fish will sit.
Place a sea bass fillet skin‑side up on the pool.
Arrange a fennel half beside the fish and a small pile of compressed cucumber on the other side.
Scatter toasted buckwheat around the plate for crunch.
Spoon a little extra beurre monté over the fish (do not drown) and dot with lemon oil or thin lemon segments.
Finish with microgreens or dill and an extra pinch of flaky sea salt.

Serve immediately while the beurre monté is silky warm and the cucumber remains crisp.

Timing plan (for service)

0–10 minutes: Make tea‑clarified butter and start beurre monté; toast buckwheat.
10–20 minutes: Prep fennel and cucumber; start compressing cucumber.
20–30 minutes: Char fennel and finish beurre monté.
30–40 minutes: Sear fish and assemble plates.

With practice this becomes a smooth service for four.

Make‑ahead & storage

Tea‑clarified butter can be made 1–2 days ahead and refrigerated. Rewarm gently and rebuild the beurre monté with cold butter just before service.
Compressed cucumber holds well 24 hours.
Toasted buckwheat stores in an airtight container for 2–3 days.

Pairing suggestions

A crisp, citrusy white (Albariño, Grüner Veltliner) or a light, herbal green tea. For a cocktail, a dry gin with a lemon twist complements the dish’s smoky‑citrus balance.

Final chef notes (the secret summary)

The single transformative element is the Lapsang Souchong infusion into the butter before emulsification. By clarifying the butter with the tea, then forming a beurre monté, you trap the tea’s smoke in a silken emulsion that clings to fish and vegetables without overpowering them. The charred fennel amplifies the tea’s smoked herbaceousness, compressed cucumber gives refreshing lift, and toasted buckwheat supplies satisfying crunch that echoes the tea’s roasted notes. This is a refined dish where every component speaks to the center secret — smoky tea in butter — and nothing competes.