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Karpatka (Polish Carpathian Cream Cake)

Karpatka (Polish Carpathian Cream Cake) recipe for #BakingBloggers: Baking of Poland! Two layers of wavy pâte à choux are filled with a creamy custard and topped with powdered sugar to resemble the Carpathian Mountains.
Course Dessert
Cuisine Polish
Keyword cake, cream, dessert, pâte à choux, Poland, Polish
Prep Time 30 minutes
Cook Time 30 minutes
Resting Time: 30 minutes
Total Time 1 hour 30 minutes
Servings 12 Slices

Ingredients

Pâte à Choux:

  • 1 cup water
  • 1 cup unsalted butter
  • Pinch salt
  • 1 cup all-purpose flour
  • 5 large eggs
  • 1 teaspoon baking powder

Vanilla Cream Filling:

  • 3 cups milk
  • 5 tablespoons all-purpose flour
  • 3 tablespoons potato starch
  • 2 teaspoons vanilla sugar or 1 vanilla bean with the seeds scraped out or 1 teaspoon vanilla extract
  • 1 cup unsalted butter softened at room temperature
  • 1 cup granulated sugar

For serving:

  • Powdered sugar for dusting

Instructions

  • Preheat oven to 400˚F. Line two baking sheets with parchment.

To make the pâte à choux:

  • In a medium saucepan, add the water and butter over medium heat. Once melted, whisk in the flour, reduce heat to low, and cook, continuing to stir, until the dough lifts from the sides and bottom of the pan. Remove from heat and allow to cool.
  • Beat the eggs into the dough, one at a time, until well-combined, followed by the baking powder.
  • Divide the dough into two equal pieces. Place each piece on the prepared baking sheet and press into equal rectangles about 1/4 inch thick.
  • Bake in the preheated oven until puffed and golden, 15 to 20 minutes. Do not open the oven door until it is nearly done. Remove and allow to cool to room temperature.

To make the vanilla cream filling:

  • In a large saucepan, place the milk over medium heat. Once starting to steam, whisk in the flour, potato starch, and vanilla sugar (if using vanilla extract, wait to add until after removing from heat) until smooth with no lumps. Once bubbling, reduce heat to low and continue to whisk until the mixture has thickened to the consistency of pudding. Remove from heat and allow to cool to room temperature.
  • In a large bowl, beat together the butter and sugar until light and fluffy. Slowly mix in the cooled milk pudding until smooth.
  • Evenly spread the cream custard over on layer of the cooled pâte à choux, leaving an 1 inch border around the edges. Gently top with the other layer of dough. Refrigerate until chilled, then sprinkle with powdered sugar and cut into squares to serve.