Wonderful Polish Cake

Ingredients : 

• 150g flour (1 + 1/2 cups)
• 100ml water (1/2 cup)
• 100ml milk (1/2 cup)
• 80g butter (1/3 cup)
• 4 eggs
• 1 teaspoon baking powder
• 1/2 teaspoon salt

For the Cream:

• 500ml milk
• 150g sugar (3/4 cup)
• 100g flour (1 cup)
• 2 eggs
• 180g butter (3/4 cup)
• Optional: vanilla flavor
• Icing sugar for dusting

Instructions : 

1. In a pot, combine 100ml of milk, 100ml of water, and 80g of butter. Add 1/2 teaspoon of salt.
2. Bring the mixture to a boil.
3. Once the mixture starts to boil, add 150g of flour and 1 teaspoon of baking powder.
4. Stir continuously until the mixture comes off the sides of the pot and forms a smooth dough.
5. Let the dough cool down slightly.
6. Preheat the oven to 200°C (392°F).
7. Add the eggs one at a time to the dough, mixing well after each addition until the dough is smooth.
8. Line a 25 cm baking pan with parchment paper.
9. Pour half of the dough into the pan and spread it evenly.
10. Bake in a static oven at 200°C (392°F) for 20 minutes in the medium-low part of the oven. Do not open the oven during baking.
11. Repeat for the second layer.
12. In a bowl, whisk together 2 eggs, 150g of sugar, and 100g of flour.
13. In a pot, bring 500ml of milk to a boil.
14. Gradually add the egg mixture to the boiling milk, stirring constantly.
15. Cook for about 3 minutes after it starts to boil, then turn off the heat.
16. Cover the pot and let the cream cool.
17. In a mixing bowl, beat 180g of butter until fluffy.
18. Gradually add the cooled cream to the butter, mixing well until smooth.
19. You can add a few drops of vanilla flavor if desired.
20. Place one layer of the baked dough on a serving plate.
21. Spread the cream evenly over the layer.
22. Place the second layer of dough on top.
23. Leave the cake in the refrigerator for at least 2 hours before serving.
24. Dust with icing sugar just before serving.