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Instructions
Place chocolate in a microwave-safe glass or ceramic bowl; microwave in 15-second intervals, stirring after each interval, until chocolate is almost melted. Stir until smooth. Set aside.
Beat 1 cup sugar and margarine together in a large bowl until light and fluffy. Beat in egg yolks, one at a time, until well blended; fold in chocolate.
Beat egg whites and 1 pinch sugar in a medium bowl until stiff peaks form; fold into chocolate mixture.
Pour ¼ bottle wine into an 8x8-inch baking dish. Soak 1 matzo sheet briefly on both sides; transfer to a serving platter (do not oversoak or matzo will fall apart). Add more wine to the baking dish as needed.
Spread thin layer chocolate mixture over wine-soaked matzo. Repeat soaking matzo and spreading with chocolate mixture; stack matzo layers on top of each other. Frost sides of matzo cake with remaining chocolate mixture.
Press nuts onto cake sides or sprinkle on top. Refrigerate before serving, 8 hours to overnight.