Triangular Dumplings

Cream together lard or butter and confectioner's sugar until light and fluffy, about 2-3 minutes.

Beat in the egg yolks one at a time, then add the whole egg, mixing well after each addition.

Combine flour with baking powder, then gradually add to the wet mixture along with water and vanilla until a stiff dough forms.

Fold in the ground walnuts gently until evenly distributed throughout the dough.

Dust a work surface with flour and roll out the dough to about ¼-inch thickness, then cut into 3-inch squares.

Fold each square diagonally in half, then fold the resulting triangle in half again to create a smaller triangle, pressing edges gently to seal.

Brush the triangular dumplings with beaten egg white on both sides.

Preheat oven to 350°F (175°C) and line a baking sheet with parchment paper.

Arrange dumplings on the prepared baking sheet and bake until golden brown, about 15-20 minutes.

Remove from oven and cool on a wire rack for a few minutes before serving.