Northland Square

Name: Northland Square (Felvidéki Pite)
Cuisine: Hungary
Ingredients: ¼ pound butter; 2 tablespoons lemon juice; 1 cup sugar; ¾ cup cake flour; 1 tablespoon cocoa, sieved; 5 eggs, separated; Grated rind of ½ lemon; ¾ cup ground walnuts; ½ cup currant jam