Chocolate Passover Sponge Cake Recipes

Steps:

• Preheat oven to 325 degrees F (165 degrees C). Cut parchment paper to line the bottom of a 10 inch tube pan. Do not grease the pan.
• In a medium bowl, whip egg yolks until light. Gradually add 1 cup sugar and orange zest; continue whipping until thick and pale, about 7 minutes. Sift together the matzo cake meal and potato starch; set aside. In a large glass or metal mixing bowl, beat egg whites until foamy. Gradually add remaining 1/2 cup sugar, continuing to beat until whites form stiff peaks. Fold the dry ingredients into the yolk mixture alternately with the juice. Fold 1/3 of the whites into the batter, then quickly fold in remaining whites until no streaks remain. Spread evenly into the prepared pan.
• Bake for 1 hour and 10 minutes in the preheated oven, until cake springs back to the touch. Invert onto a wire rack to cool. Run a knife around the sides of the cake before removing from the pan.

Steps:

• Preheat the oven to 350°F (180°C). Line the bottom of a 9-inch (23-cm) springform pan with parchment paper.
• Break up or chop the chocolate and place it in a heatproof bowl with the butter or margarine. Set the bowl over a saucepan of barely simmering water and allow the chocolate and butter to melt, stirring occasionally. When everything has melted, remove from the heat and let cool to room temperature.
• In the meantime, put the egg yolks in a large bowl. In the bowl of a stand mixer fitted with the whisk attachment, or in a large bowl, using a handheld mixer, whip the egg whites to very firm peaks, about 5 minutes.
• When the melted chocolate mixture has cooled, add it to the egg yolks, along with the sugar, and whisk well.
• Using a rubber spatula, stir about one-third or less of the egg whites into the chocolate mixture to lighten it. Carefully spoon another third of the egg whites on top of the chocolate mixture and gently fold them in. Add the remaining whites and fold them in just until incorporated.
• Transfer half of the batter to another bowl and set aside in the refrigerator.
• Pour the remaining batter into the prepared pan and bake for 20 minutes: it will turn into a soft, moist cake. Remove from the oven and let cool completely in the pan.
• When the cake has reached room temperature, pour the reserved chocolate mousse on top of it. Refrigerate the mousse cake, uncovered, for at least 2 hours, or overnight, until set.
• When you're ready to serve, run a sharp thin-bladed knife around the cake's edges and then remove the sides of the springform pan. Peel the paper from the bottom, and place the cake on a serving platter. Serve cold, decorated with chocolate shavings, if desired.
• Leftover cake will keep in the refrigerator, wrapped in aluminum foil, for a couple of days.