Mille-Feuille with Candied Kimchi and Light Pastry Cream

This innovative recipe combines the flaky, buttery layers of puff pastry with a unique twist: candied kimchi leaves and a light, creamy custard filling. Perfect for adventurous bakers looking to create a dessert that blends sweet and savory flavors in a visually stunning presentation. The candied kimchi adds a subtle sweet-savory crunch that complements the rich pastry cream and delicate puff pastry, creating a harmonious and unforgettable flavor profile. Follow these detailed steps to craft an unforgettable mille-feuille (napoleon) that will impress your guests.

Ingredients

Puff Pastry (Detrempe)

• 500g all-purpose flour
• 10g salt
• 250ml water
• 75g unsalted butter, melted
• 300g high-fat butter (for laminating)

Sugar Syrup with Kimchi

• 200ml water
• 100g granulated sugar
• 4 large kimchi cabbage leaves (lightly spiced)

Light Pastry Cream

• 500ml whole milk
• 1 tsp powdered vanilla (or vanilla extract)
• 120g granulated sugar (divided into two 60g portions)
• 4 large egg yolks
• 45g custard powder (flan powder)
• 50g unsalted butter
• 100ml whipping cream
• 100g icing sugar, sifted (optional, for dusting)

Equipment Needed

• Mixing bowl
• Rolling pin
• Parchment paper
• Baking sheet
• Saucepan
• Whisk
• Piping bag with a large plain nozzle
• Wire cooling rack

Instructions

Step 1: Prepare the Puff Pastry (Detrempe)

1. Sift 500g flour and 10g salt into a large mixing bowl. Make a well in the center.
2. Pour 250ml water and 75g melted unsalted butter into the well. Mix gently with your fingertips until combined.
3. Using a pastry scraper, work the mixture until loose crumbs form. If the dough feels too dry, add a small amount of water (1–2 tsp), being careful not to make it sticky. The dough should feel soft but not sticky.
4. Shape the dough into a ball (this is the detrempe). Cut a shallow “X” on top to prevent shrinkage.
5. Wrap the dough in floured parchment paper and refrigerate for 30 minutes.

Step 2: Incorporate the Butter

1. On a lightly floured, cold work surface, flatten the chilled detrempe and roll it out into a cross shape, leaving a thicker mound in the center.
2. Place 300g high-fat butter in the center of the cross. Gently pull and fold each section of dough over the butter to fully enclose it, creating a paton. Ensure the butter is completely sealed to prevent leakage.
3. Lightly flour the surface and rolling pin. Roll over the top of the dough to seal the edges. Wrap in parchment paper and refrigerate for 30 minutes.

Step 3: Laminate the Dough

1. Roll the chilled paton into a long rectangle. Fold the bottom third up toward the middle, then fold the top third down over it, brushing off excess flour. Ensure the edges align to form a square with three layers (this is the first “turn”).
2. Rotate the dough 90 degrees (like turning a book so the exposed edge is on the right). Gently press the edges to seal.
3. Roll out into a long rectangle again and repeat the folding process for the second “turn.” Mark the dough with a fingertip to indicate two turns. Wrap and chill for 30 minutes.
4. Repeat the rolling and folding process for a total of six turns, chilling for 30 minutes after every two turns. The dough should feel smooth and uniform by the final turn.

Step 4: Make the Sugar Syrup with Kimchi

1. In a saucepan over low heat, combine 200ml water and 100g sugar. Stir until the sugar dissolves completely.
2. Bring the syrup to a boil without stirring. If sugar crystallizes on the pan’s sides, brush it down with a wet pastry brush.
3. Drain 2 kimchi cabbage leaves and soak them in the boiling syrup for 1–2 minutes. Remove, drain again, and spread flat on parchment paper. The leaves should look glossy and slightly translucent.
4. Preheat the oven to 90℃. Place the kimchi leaves in the oven and bake for approximately 1.5 hours until dry and crisp, resembling delicate, translucent wafers.
5. Cut the remaining 2 kimchi leaves into small dice. Add to the syrup, bring to a boil, and simmer over low heat for 30 minutes until candied. The diced kimchi should be soft and coated in a glossy syrup. Set aside.

Step 5: Prepare the Light Pastry Cream

1. Divide 120g granulated sugar into two equal 60g portions.
2. In a saucepan, heat 500ml milk, 1 tsp powdered vanilla, and one 60g portion of sugar until just boiling.
3. In a bowl, whisk 4 egg yolks with the remaining 60g sugar until pale and thick (the mixture should lighten in color and increase in volume). Add 45g custard powder and mix well.
4. Gradually pour the hot milk mixture into the egg mixture, stirring constantly to prevent curdling.
5. Return the mixture to the saucepan and heat gently, stirring continuously, until it thickens and boils. Boil for 1 minute, then remove from heat. The cream should be smooth and thick enough to coat the back of a spoon.
6. Stir in 50g unsalted butter. Cover with plastic wrap or parchment paper, pressing it directly onto the surface to prevent a skin from forming. Let cool completely.
7. Whip 100ml whipping cream to soft peaks. Gently fold it into the cooled pastry cream until fully incorporated. Transfer to a piping bag fitted with a large plain nozzle.

Step 6: Bake the Puff Pastry

1. Increase the oven temperature to 170℃.
2. Roll out the chilled puff pastry into a thin, even layer (about 2–3mm thick). Place on a baking sheet and cut into equal-sized triangles.
3. Refrigerate the triangles for 30 minutes to chill.
4. Bake in the preheated oven for 20–25 minutes until the pastry is golden-brown, puffed up, and very light to the touch. Cool on a wire rack.

Step 7: Assemble the Mille-Feuille

1. Drain the candied kimchi dice and gently fold them into 500g of the cooled pastry cream. The cream should have a subtle sweet-savory flavor from the kimchi.
2. Pipe small balls of the kimchi-infused pastry cream onto one-third of the puff pastry triangles.
3. Place a second pastry triangle on top of the cream. Pipe another layer of cream on top.
4. Top with a third pastry triangle. Dust with sifted icing sugar (optional) for a polished look.
5. Garnish each mille-feuille with a crisp, dried kimchi leaf for a striking presentation.

Flavor Profile

The mille-feuille offers a delightful contrast of textures and flavors. The puff pastry is buttery and flaky, providing a crisp foundation. The pastry cream is rich, creamy, and subtly sweet with a hint of vanilla, while the candied kimchi introduces a unique sweet-savory note. The kimchi, originally tangy and slightly spicy, transforms during candying into a sweet, chewy element with a gentle umami undertone that harmonizes surprisingly well with the cream and pastry. The crisp kimchi leaves add a delicate crunch and a touch of savory sophistication, making each bite a complex and memorable experience.

Serving Suggestion

Serve immediately for the best texture, or refrigerate and consume within a day to enjoy the delicate balance of flaky pastry, creamy filling, and the unique sweet-savory crunch of candied kimchi. This dessert is perfect for special occasions or to surprise guests with a bold flavor combination.

Tips

• Ensure all ingredients are cold when preparing the puff pastry to achieve maximum flakiness. The dough should remain cool to the touch during lamination.
• For a milder kimchi flavor, choose lightly spiced kimchi leaves and rinse them briefly before candying to reduce any sharp tanginess.
• If time is limited, consider using store-bought puff pastry for a quicker preparation.
• When baking the pastry, check for a golden-brown color and a light, airy texture to ensure it’s fully baked.
• For a professional finish, pipe the pastry cream in even, uniform balls to create a visually appealing layered effect.