Food & Cooking Recipes Dessert & Treats Recipes Cake Recipes Fudgy Brownie Cake 3.6 (167) 7 Reviews By Martha Stewart Test Kitchen Martha Stewart Test Kitchen The recipes developed by our test kitchen team have undergone a rigorous process of development and testing, ensuring that every element is optimal, from ingredient amounts to method and cooking time. This process includes triple-testing recipes to ensure they meet our high standards. The many stellar cooks and food editors who have been part of our team include Sarah Carey, Lucinda Scala Quinn, Jennifer Aaronson, Shira Bocar, Anna Kovel, Greg Lofts, Riley Wofford, Lauren Tyrell, and Lindsay Leopold. Editorial Guidelines Updated on July 29, 2020 Print Rate It Share Share Tweet Pin Email Photo: Chris Court Prep Time: 20 mins Total Time: 55 mins Yield: 10 to 12 Serves This cake may look plain, but inside, it's moist, dense, and intensely flavored. In other words, it's a chocolate lover's dream come true. The fact that it takes just 20 minutes of effort is all the icing you need. Ingredients 1 stick unsalted butter, cut into large pieces, plus more for pan 3 tablespoons unbleached all-purpose flour, plus more for pan 6 ounces bittersweet chocolate (61 to 70 percent cacao), finely chopped ¾ cup plus 2 tablespoons sugar, divided 1 large egg yolk plus 3 large egg whites, room temperature, divided ¼ cup unsweetened cocoa powder, plus more for dusting ½ teaspoon kosher salt ½ teaspoon coarse salt Directions Preheat oven to 325 degrees. Butter and flour a 9-inch springform pan. Melt butter and chocolate in a bowl set over a saucepan of simmering water, stirring until smooth. Remove from heat, and whisk in 3/4 cup sugar. Whisk in egg yolk, then cocoa powder and salt. Beat egg whites with a mixer on medium speed until foamy. Raise speed to medium-high, gradually beat in remaining 2 tablespoons sugar, and beat until soft, glossy peaks form, about 4 minutes. Fold flour into chocolate mixture with a rubber spatula, then fold in egg whites. Pour batter into pan, and bake until set, about 33 minutes. Let cake cool completely in pan on a wire rack. Remove side of pan, and dust top of cake with cocoa powder. Cook's Notes Cake can be stored in pan at room temperature, wrapped in plastic wrap (do not let plastic touch cake), up to 1 day. Rate it Print