Ingredients* 3 cups all-purpose flour* 1 cup unsalted butter, softened* ½ cup sour cream* 1 egg yolk* 2 tablespoons sugar* 1 teaspoon vanilla extract* 1 teaspoon baking powder* A pinch of saltFor the walnut filling:* 1½ cups ground walnuts* ½ cup sugar* 1 teaspoon cinnamon* 3 tablespoons milkFor decoration:\- Powdered sugarInstructions* In a large bowl, mix the flour, baking powder, sugar, and salt.* Add the softened butter, sour cream, egg yolk, and vanilla extract. Mix until a smooth dough forms.* In another bowl, combine the ground walnuts, sugar, cinnamon, and milk to make the filling.* Roll out the dough on a floured surface and cut it into small rectangles.* Place a spoonful of walnut filling on each piece of dough and roll it up tightly.* Arrange the rolls on a baking tray lined with parchment paper.* Bake in a preheated oven at 180°C (350°F) for 20–25 minutes, until lightly golden.* Allow the rolls to cool slightly, then generously dust them with powdered sugar.Serving SuggestionServe these delicious Hungarian walnut rolls with a cup of coffee or tea. They are buttery, sweet, and perfect for holidays or family gatherings. Enjoy!