Eclair Cake – Karpatka – Polish Carpathian Mountain Cream Cake

Karpatka – Eclair Cake, also known as Polish Carpathian Mountain Cream Cake, is a delightful dessert that has captured the hearts of pastry lovers around the world. From the moment I laid eyes on this decadent treat, I knew I had to try it, and it did not disappoint!

This cake is essentially a giant cream puff or eclair, made up of two layers of choux pastry that are filled with a generous amount of vanilla cream. Each bite is a harmonious blend of crisp, buttery pastry and luscious, velvety cream. It’s a dessert that’s perfect for any occasion, be it a family gathering or a fancy dinner party.

One of the things I love most about this cake is its name. The word “Karpatka” comes from the Carpathian Mountains, which stretch across several countries in Central and Eastern Europe. As the choux pastry bakes, it puffs up and takes on irregular shapes, which, when dusted with powdered sugar, resemble the snowy peaks of the mountains. It’s a beautiful and fitting name for a cake that’s as stunning as it is delicious.

To take this cake to the next level, you can serve it with a berry coulis or chocolate sauce. The tartness of the berries or the richness of the chocolate complements the sweetness of the vanilla cream and the buttery flavor of the choux pastry perfectly. It’s a great way to add some extra flavor and texture to an already fantastic dessert.

How to make this Karpatka Eclair Cake

First, prepare the vanilla pastry cream by whisking together eggs, sugar, flour, and cornstarch. Gradually add boiling milk, return to heat, and cook until thickened. Add vanilla extract, cover, and let cool.

For the choux pastry layers, boil milk, water, sugar, salt, and butter, then add flour and cook until the dough pulls away from the pan. Add eggs one at a time, divide evenly, and bake until puffed and golden brown.

For the vanilla filling, mix butter with pastry cream until fully incorporated. Assembly involves placing the first layer of choux pastry on a serving platter, adding vanilla cream, placing the second layer of pastry, and refrigerating for several hours. Dust with powdered sugar before serving, and enjoy with berry coulis or chocolate sauce if desired.

I highly recommend trying this Karpatka Eclair Cake. It’s a show-stopping dessert that’s sure to impress your friends and family. And with its simple yet elegant flavor profile, it’s a dessert that’s perfect for any occasion. So, don’t hesitate to give it a try, and I promise you won’t be disappointed! If you do, don’t forget to tag me on Instagram, would love to see how it turns out for you.  For a twist on the classic recipe, be sure to try the Chocolate Karpatka Eclair Cake. Enjoy!

Other custard desserts you may like to try

This Norwegian Verdens Beste Cake consists of two layers of soft vanilla sponge cake topped with crispy baked meringue and toasted almonds filled with smooth and creamy vanilla custard and whipped cream.

You also must try the twist to this amazing dessert, the Chocolate Norwegian Cake. Another custard dessert we love is this Ding Don Cake which consists of two layers of rich and moist chocolate cake that are filled with a creamy and fluffy vanilla custard cream filling, then topped with a smooth and rich chocolate ganache.

For a nutty caramel, experience try this Pecan Caramel Mousse Cake with two layers of vanilla sponge cake with caramel pecan topping and with a smooth custard salted caramel mousse filling.

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Eclair Cake - Karpatka - Polish Carpathian Mountain Cream Cake

Eclair Cake - Karpatka - Polish Carpathian Mountain Cream Cake

4.34 from 3 votes
Karpatka - Eclair Cake, also known as Polish Carpathian Mountain Cream Cake, is a delightful dessert that has captured the hearts of pastry lovers around the world. This cake is essentially a giant cream puff or eclair, made up of two layers of choux pastry that are filled with a generous amount of vanilla cream
Servings 12 servings
Prep Time 30 minutes
Cook Time 30 minutes
Total Time 1 hour


Choux Pastry Layers

  • 3/4 cup (95g) bread flour
  • 1/3 cup (80ml) milk
  • 1/3 cup (80ml) water
  • 2 tsp (10g) sugar
  • 1/2 tsp (2g) salt
  • 2 oz (60g) unsalted butter
  • 3 eggs

Vanilla Filling

  • 2 cups (500ml) milk
  • 2/3 cup (135g) sugar
  • 1/4 cup (30g) cornstarch
  • 1 tbsp (10g) flour
  • 2 eggs
  • 2 tsp (10g) vanilla extract
  • 3/4 cup (170g) butter , room temperature


Prepare the vanilla pastry cream.

  • Prepare this first to have time to cool. Place milk in a medium saucepan and bring to a boil.
  • Meanwhile whisk the eggs with sugar until well combined. Add flour and cornstarch and mix to combine.
  • Gradually add milk into the egg mixture and return to heat. Cook stirring constantly until it boils and thickens.
  • Remove from heat and add vanilla extract.
  • Pour the cream into a clean bowl, cover with plastic wrap, pressing it directly onto the surface of the pastry cream to prevent forming a skin on the surface. Let cool to room temperature.

Prepare choux pastry layers.

  • In a saucepan bring the milk, water, sugar, salt and butter to a boil.
  • Remove from heat and add flour all at once and incorporate mixing energetically with a wooden spoon until homogenous.
  • Return the saucepan over low heat and while stirring cook for 1 minute or two to pull out the moisture from the batter and until it pulls away from the sides of the pan. You will see some of the dough sticks to the bottom of the pan.
  • Transfer batter to a large bowl and allow to cool slightly.
  • Meanwhile preheat the oven to 375 F (190C). Grease two 8 inch (20cm) pans and line with parchment paper.
  • Add the eggs one at a time, carefully incorporating each into the batter, using a wooden spoon or even a stand mixer. It will result in a smooth, homogeneous batter which still holds its shape.
  • Divide choux pastry evenly and spread on the bottom of the pans.
  • Bake for 25-30 minutes until nicely puffed and golden brown.
  • Let cool.

Prepare the vanilla cream filling.

  • Place butter into a large bowl and mix until creamy. Gradually add spoons of pastry cream and mix to incorporate. Add another spoon only when the other spon is fully incorporated. Repeat until all the pastry cream is fully incorporated.

Assemble the cake.

  • Add a bit of vanilla cream on a serving platter. Add the first layer of choux pastry. Place a ring and line with an acetate sheet for easier removal. Add vanilla cream on top of the pastry layer. Fill the gaps from the second layer of pastry and place on top of the vanilla cream. Cover and refrigerate for 4-6 hours or better overnight.
  • Before serving, dust with powdered sugar. Serve as is or with a berry coulis or chocolate sauce. Enjoy!



Serving: 1 serving out of 12Calories: 333kcalCarbohydrates: 28.5gProtein: 6gFat: 22.2gSaturated Fat: 13.3gCholesterol: 136mgSugar: 17.5g
Calories: 333kcal
Course: Dessert
Cuisine: Polish
Keyword: eclair cake, karpatka, Polish Carpathian Mountain Cream Cake, Polish Vanila Slice, vanilla cake

Did you make this recipe?

Please let me know how it turned out for you! Leave a comment below and tag @homecookingadventure on Instagram and hashtag it #homecookingadventure.

Join the Conversation

  1. Susan P Author says:

    Your video’s are mesmerizing. This looks so delicious. I’m going to try it for a brunch this weekend. You always make even the most intricate recipe look easy. Keeping fingers crossed.

  2. Julie Author says:

    Delicious!! I mean what could possibly be wrong with a giant cream puff! My husband and I really like it, this recipe is a keeper. My only complaint is that the cream filling seems to separate once chilled and be a bit grainy. Maybe I didn’t beat the filling enough but it was smooth when I finished making it, then became grainy overnight. I might try making a different recipe of German buttercream for it next time… essentially the same thing but different proportions

    1. Ella-HomeCookingAdventure Author says:

      Not sure why it got grainy.. hope you didn't overcook the pastry cream.. this might be a reason. 

  3. monika Author says:

    i never have bread flour on hand…will this work with all-purpose flour?

    1. Ella-HomeCookingAdventure Author says:

      yes.. all purpose flour will be as good for this recipe. 

  4. Monika Author says:

    Second question: if we don’t have a mold and acetate, can we place it back into the pan and use cling wrap or parchment paper?

    1. Ella-HomeCookingAdventure Author says:

      Sorry for the late answer.. yes, you can definitely use cling wrap or even parchment paper if you don't have acetate sheet. 

  5. Emilet Author says:

    Hi! Looks sooo delish! Do you think i can bake these in 9 inches baking pan?

  6. When is the butter added to the filling mixture?

  7. Ah, nevermind- butter is added after filling has cooled. I needed to read all the way through.

  8. Mine came out very flat and very thin I used the same quantity. Yours looks bigger and fluffy..

    1. Ella Marincus-HomeCookingAdventure Author says:

      What size did you use for the pan?

    2. Mine too. I followed the recipe exactly and have made cream puffs before with no issues. Very disappointing since this looked wonderful!

      1. Ella - Home Cooking Adventure Author says:

        Prepare the ice cream in advance and freeze. Prepare the brownie with 1-2 days in advance and keep at room temperature. Top with meringue only on the serving day.

  9. How do you print the Carpathian Cake recipe????

    1. Ella - Home Cooking Adventure Author says:

      You have now the print button. We fixed the function.

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