Hungarian Lattice Pastry
["1/4 c. sugar", "1/2 pt. sour cream", "1 tsp. baking powder", "1 lb. ground nuts", "nut filling (see following)", "3/4 c. butter", "1 Tbsp. vanilla", "4 eggs", "1 large jar preserves"]
["Sift flour, sugar and baking powder into a bowl.", "Add butter and mix as for pie dough.", "Mix together sour cream, egg yolks and vanilla.", "Add this mixture to dough mixture and mix well.", "Dough will be soft.", "Roll a little more than 1/2 of dough into a jelly roll pan.", "Spread the jam on top.", "Beat egg whites and 1/2 cup sugar gradually until stiff, then fold in nuts.", "Spread the nut mixture on the preserves.", "Be careful not to mix the two toppings. Make narrow strips of dough in a crisscross pattern on top of nut filling.", "Bake at 350\u00b0 for 30 minutes or until golden brown."]
["sugar", "sour cream", "baking powder", "ground nuts", "nut filling", "butter", "vanilla", "eggs", "preserves"]