Recipe Servings: 12 Chocolate Cake 1 2/3 cup All Purpose Flour 1 cup packed light brown sugar 1 cup granulated sugar 3/4 cup cocoa powder 1 1/2 teaspoon baking soda 3/4 teaspoon salt 1/2 cup unsalted butter melted 1/2 cup vegetable oil 2 large eggs, 1 egg yolk lightly beaten