INGREDIENTS: Chocolate Cake 1 large egg 1 cup granulated sugar 6 ounces plain, vanilla, or chocolate yogurt (thicker Greek-style preferred, do not use diet, fat-free or light yogurt; sour cream may be substituted) 1/4 cup canola or vegetable oil 1 1/2 teaspoons vanilla extract 1/2 cup brewed coffee, room temperature or warm 1/2 cup unsweetened natural cocoa powder 1 cup all-purpose flour 1 teaspoon baking soda 1/2 teaspoon baking powder 1/2 teaspoon salt, optional Chocolate Ganache 9 ounces semi-sweet chocolate (about 1 1/2 cups semi-sweet chocolate chips) 3/4 cup heavy cream or half-and-half 1 teaspoon vanilla extract (or optionally use 1 to 2 tablespoons rum, bourbon, coffee-, orange-, raspberry-, chocolate-flavored liqueur) DIRECTIONS: Cake � Preheat oven to 350� F. Line a 9-by-9-inch square baking pan with aluminum foil and spray with cooking spray, or grease and flour the pan; set aside. In a large mixing bowl combine egg, sugar, yogurt, oil, vanilla, and whisk until smooth a...