Chocolate Agrumato Cake

Dark Chocolate-Blood Orange Agrumato Cake with Blood Orange Ganache 1/2 cup cocoa powder 1 tsp. vanilla extract 1 1/2 cups all-purpose flour 1 cup granulated sugar 1/4 tsp. salt 1 tsp. baking soda 1 Tbs. tangerine dark balsamic 2 large eggs beaten with enough cold water to equal one cup