Duck Confit Burger with Caramelized Onion and Mustard Recipe
Introduction
Enjoy a gourmet twist on a classic favorite with this delicious duck confit burger. Packed with tender, flavorful shredded duck and savory onion marmalade, it’s a perfect meal for impressing friends or treating yourself.

Ingredients
- 1 tbsp olive oil
- 1 red onion, finely sliced
- 2 tbsp onion marmalade
- 500g pack duck leg confit
- 4 brioche burger buns
- 1 tbsp butter, at room temperature
- 1 tbsp Dijon mustard
- 80g bag rocket or frisée salad leaves
Instructions
- Step 1: In a small saucepan, heat the olive oil over low heat. Add the finely sliced red onion and fry gently for 10–15 minutes until soft and caramelized. Stir in the onion marmalade and remove from heat.
- Step 2: Cook the duck confit according to the pack instructions. Once cooked, remove the meat from the bone and pull it into thick shreds. Season to taste.
- Step 3: Cut the brioche buns in half. Spread the cut sides with room temperature butter. Place the buns, butter-side down, onto a hot griddle pan. Cook for about 1 minute until grill lines appear.
- Step 4: Spread Dijon mustard on one half of each bun and the caramelized onion marmalade on the other half. Fill each bun with shredded duck and a handful of rocket or frisée salad leaves. Serve immediately.
Tips & Variations
- For extra flavor, warm the onion marmalade slightly before spreading on the buns.
- Substitute rocket with watercress or baby spinach for a different salad note.
- Add a slice of melted cheese, like Gruyère or Swiss, for a richer burger.
Storage
Store any leftover shredded duck confit and onion marmalade in airtight containers in the refrigerator for up to 2 days. Reheat the duck gently in a pan over low heat to keep it tender before assembling a fresh burger. Avoid refrigerating the buns after toasting to prevent sogginess.
How to Serve

Serve this delicious recipe with your favorite sides.
FAQs
Can I use duck breast instead of duck leg confit?
Yes, but duck leg confit offers a more tender and flavorful texture due to the slow-cooking process. Duck breast can be used but may be drier and less rich.
Is it necessary to use brioche buns?
Brioche buns are recommended for their soft, slightly sweet taste that complements the duck well, but any sturdy burger bun will work if preferred.
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Duck Confit Burger with Caramelized Onion and Mustard Recipe
- Total Time: 30 minutes
- Yield: 4 burgers 1x
Description
A mouthwatering duck confit burger featuring tender shredded duck leg confit paired with sweet onion marmalade and crisp rocket salad, served on toasted brioche buns for a gourmet twist on a classic burger.
Ingredients
Main Ingredients
- 1 tbsp olive oil
- 1 red onion, finely sliced
- 2 tbsp onion marmalade
- 500g pack duck leg confit
- 4 brioche burger buns
- 1 tbsp butter, at room temperature
- 1 tbsp Dijon mustard
- 80g bag rocket or frisée salad leaves
Instructions
- Prepare the onion marmalade: In a small saucepan, heat the olive oil over low heat. Add the finely sliced red onion and fry gently for 10-15 minutes until very soft. Stir in the onion marmalade and then remove from heat.
- Cook the duck confit: Follow the pack instructions to cook the duck leg confit. Once cooked, remove the duck meat from the bone and shred into thick pieces. Season the shredded duck to taste.
- Toast the brioche buns: Cut the brioche buns in half and spread the cut sides with butter. Place them butter-side down on a griddle pan over high heat for about 1 minute, until griddle lines appear and the buns are lightly toasted.
- Assemble the burgers: Spread Dijon mustard on one half of each toasted bun and onion marmalade on the other half. Fill the buns with shredded duck leg confit and a handful of rocket or frisée salad leaves. Serve immediately for the best flavor and texture.
Notes
- Use high-quality duck confit for the best flavor and tenderness.
- If onion marmalade is unavailable, caramelized onions with a touch of brown sugar can be substituted.
- For extra heat, add a few slices of pickled jalapeños or a drizzle of hot sauce.
- Warm the salad leaves slightly before assembling to slightly wilt them if preferred.
- This burger pairs well with crispy fries or a side of roasted vegetables.
- Prep Time: 10 minutes
- Cook Time: 20 minutes
- Category: Burger
- Method: Stovetop
- Cuisine: French-inspired
Keywords: duck confit burger, brioche bun burger, gourmet burger, onion marmalade burger, shredded duck burger

