HomeRecipes › Kingfish with Mustard + Caper Butter

Kingfish with Mustard + Caper Butter

📍 Australia-wide 🗓️ Updated April 2026 ⏱️ 2 min read ✅ Expert-reviewed
17 Top Destinations
7 States & Territories
5 Epic Road Trips
1000s Campsites Mapped
Fried chicken with rice and salad on a plate

Kingfish with Mustard + Caper Butter

Written by: Camping Australia

|

|

Time to read 2 min

Kingfish cutlets with mustard + caper compound butter — French bistro elegance from a campsite. The compound butter does all the work — Dijon + capers + cracked pepper softened into butter. Spread on the cutlets before grilling; the butter melts + glazes the fish as it cooks.


15 minutes start to finish. Serves 4. Restaurant-quality with almost no effort.

Recipe Card
Serves 4
Prep 15 min
Cook 30 min
Method Camp oven
Difficulty Easy
Best for Camp + home

Kingfish with Mustard + Caper Butter

Serves: 4 · Prep: 5 minutes · Cook: 8-10 minutes · Equipment: small bowl, BBQ grill or hot frying pan

Fried fish with coleslaw and rice on a plate

Photo: Zayed Ahmed Zadu / Unsplash

Ingredients

  • 4 kingfish cutlets, ~225g each (skin on, ~2cm thick)
  • 60g butter, at room temperature
  • 1 tbsp Dijon mustard
  • 1 tbsp capers, drained + chopped
  • ½ tsp salt
  • ½ tsp cracked black peppercorns
  • ¼ tsp ground paprika (sweet or smoked)

Optional add-ins: 1 tbsp lemon zest; 1 tbsp chopped chives or parsley; 1 clove minced garlic; pinch chilli flakes.


To serve: baby new potatoes, fresh dressed greens, lemon wedges, crusty bread.


Substitute fish: any firm meaty cutlet — snapper, mahi-mahi, swordfish, blue-eye trevalla, salmon all brilliant.

Method

  1. Make the compound butter. In a small bowl, mash together softened butter, Dijon mustard, chopped capers, salt, pepper + paprika until smooth.
  2. Pat fish dry with paper towel.
  3. Spread the butter generously on top of each cutlet.
  4. Heat BBQ or pan to medium-hot. Brush surface lightly with oil.
  5. Place cutlets butter-side UP on the hot surface. Cook 4-5 minutes — until the bottom is nicely seared + the top butter is bubbling + glazing.
  6. Flip ONCE. Cook another 2-3 minutes — until the fish flakes easily + flesh is just opaque. Don't overcook.
  7. Plate up with the buttery glaze drizzled over. Serve with new potatoes + greens.

Tips and variations

  • Compound butter is the trick — make in advance + freeze as a log; slice off discs as needed. Brilliant on steak, chicken, vegetables too
  • Butter at room temp mashes properly. Cold butter just lumps
  • Don't overcook the fish — kingfish is best slightly under, finished by carry-over heat
  • Lemon zest upgrade brightens the butter beautifully
  • Smoked paprika deepens the flavour profile
  • Pan-fry alternative: hot pan + butter side down first for crusty top; flip + finish 2 mins
  • Camp version: portable BBQ or pan over coals — same technique
  • Wine pairing: dry chardonnay, sancerre, or unoaked Aussie semillon

Our take

The 15-minute French bistro fish dinner. Compound butter is the universal flavour shortcut — make a batch + use throughout the week.


Caught a kingfish on the boat? This is the recipe. Sophisticated, classic, easy.

Find Your Perfect Campsite

Search thousands of campsites across every state and territory — free, with no booking fees.

Explore All Campsites →