Roll out on a floured work surface and cut into 4x4in (11x11 cm) squares.
Spread the red currant marmalade in the middle of each square.
Press opposite edges of the squares together well.
Brush with beaten egg and bake on a buttered baking sheet at 400 °F (200 °C) at first.
Then lower to 340 °F (170 °C) and bake for about 15 minutes.
Dust with confectioner’s sugar.
Notes / Tips / Wine Advice:
Filling polsterzipf with marmalade is a Viennese tradition. In Upper Austria, they are often served as a sweet main course without filling, but with vanilla sauce.