Orange Sponge Cake Be The First To Review By Anonymous recipe Comments | 0 Favorites | 9 Print Why not try this citrus cake on a very hot summer day? Orange Sponge Cake Ingredients 3 eggs1 cup white sugar1 tablespoon orange zest1 1/2 cups all-purpose flour2 teaspoons baking powder6 tablespoons orange juice Instructions 1 Preheat oven to 325 degrees F (165 degrees C). Grease and flour one 9 inch round pan. 2 Separate the eggs while cold, then bring to room temperature. 3 Beat egg yolks, sugar and grated orange rind until light and fluffy. Mix flour and baking powder together. Alternately add flour mixture and orange juice to the egg yolk mixture. 4 In a separate large CLEAN bowl, with a CLEAN whisk or beaters, beat egg whites to stiff peaks, and fold into batter. 5 Pour batter into prepared pan and bake at 325 degrees F (165 degrees C) for 50 to 60 minutes.