Chocolate Eclair Cake (Karpatka) Recipe
Chocolate Eclair Cake, also known as Karpatka, is a delightful Polish dessert featuring a light and airy choux pastry base filled with a rich vanilla custard, topped with a smooth dark chocolate ganache. This layered treat combines a crisp pastry texture with creamy filling and luscious chocolate, perfect for special occasions or a sweet indulgence.
- Author: Douaa
- Prep Time: 30 minutes
- Cook Time: 50 minutes
- Total Time: 3 hours
- Yield: 8 slices 1x
- Category: Dessert
- Method: Baking
- Cuisine: Polish
- Diet: Vegetarian
Pastry Base
- 1 cup all-purpose flour
- 1/2 cup unsalted butter
- 1 cup water
- 1/4 tsp salt
- 4 large eggs
Vanilla Filling
- 2 cups whole milk
- 1/2 cup granulated sugar
- 4 large egg yolks
- 1/4 cup cornstarch
- 1 tsp vanilla extract
- 1/2 cup unsalted butter
Chocolate Topping
- 4 oz dark chocolate
- 1/4 cup heavy cream
- Preheat and Prepare Pan: Preheat your oven to 375°F (190°C). Grease and line an 8×8-inch baking pan with parchment paper to ensure easy removal of the cake later.
- Make Pastry Dough: In a saucepan, bring the water, butter, and salt to a boil. Once the butter has melted, add the flour all at once and stir vigorously until the mixture forms a smooth dough and pulls away from the sides of the pan.
- Add Eggs: Remove the pan from heat and let the dough cool slightly. Beat in the eggs one at a time, mixing well after each addition until the batter is smooth and glossy.
- Bake First Pastry Layer: Spread half of the dough evenly into the prepared pan. Bake for 20-25 minutes or until the pastry is golden brown and puffed. Remove from oven and allow to cool completely.
- Prepare Vanilla Filling: In a separate saucepan, whisk together the milk, sugar, egg yolks, and cornstarch over medium heat. Stir continuously until the mixture thickens to a custard consistency. Remove from heat, then stir in butter and vanilla extract until smooth. Allow the filling to cool.
- Assemble First Layer: Once the first pastry layer is completely cooled, spread the vanilla custard filling evenly over it.
- Bake Second Pastry Layer: Roll out or spread the remaining dough evenly and bake again for 20-25 minutes until golden and puffed. Once cooled, place this second pastry layer on top of the vanilla filling.
- Prepare Chocolate Topping: Melt the dark chocolate and heavy cream together gently until smooth and glossy. Pour this ganache over the top pastry layer and spread evenly.
- Chill and Serve: Refrigerate the assembled cake for at least 2 hours to allow the filling and topping to set properly before slicing and serving.
Notes
- Ensure the first pastry layer is completely cooled before adding the filling to prevent it from melting.
- Use good quality dark chocolate for a richer topping.
- The cake is best served chilled and can be stored covered in the refrigerator for up to 3 days.
- For a different flavor, try adding lemon zest to the vanilla filling.
- If you don’t have an 8×8 inch pan, a similarly sized square or rectangular baking dish will work.
Nutrition
- Serving Size: 1 slice (about 120g)
- Calories: 350 kcal
- Sugar: 25 g
- Sodium: 120 mg
- Fat: 22 g
- Saturated Fat: 13 g
- Unsaturated Fat: 7 g
- Trans Fat: 0.2 g
- Carbohydrates: 30 g
- Fiber: 2 g
- Protein: 6 g
- Cholesterol: 125 mg
Keywords: Chocolate Eclair Cake, Karpatka, Polish dessert, choux pastry, vanilla custard, chocolate ganache, layered dessert