Food & Cooking Recipes Dessert & Treats Recipes Cake Recipes Salted-Caramel Six-Layer Chocolate Cake 3.8 (1,722) 64 Reviews By Martha Stewart Editors Martha Stewart Editors Facebook Instagram Twitter Website An article attributed to "Martha Stewart Editors" indicates when several writers and editors have contributed to an article over the years. These collaborations allow us to provide you with the most accurate, up-to-date, and comprehensive information available.The Martha Stewart team aims to teach and inspire readers daily with tested-until-perfected recipes, creative DIY projects, and elevated home and entertaining ideas. They are experts in their fields who research, create, and test the best ways to help readers design the life they want. The joy is in the doing. Editorial Guidelines Updated on July 27, 2020 Print Share Share Tweet Pin Email Prep Time: 45 mins Total Time: 3 hrs 20 mins Servings: 12 Yield: 1 9-inch cake If you don't own a candy thermometer, this cake offers a good excuse to buy one. It sounds a little nitpicky, but the caramel should reach exactly 238 degrees. (Any less and the cake layers won't hold together properly; any more and the caramel will turn hard.) Precision will also pay off with the chocolate frosting—it achieves its ideal spreading texture after standing for 30 minutes. Ingredients For the Cake Unsalted butter, room temperature, for pans 3 cups all-purpose flour, plus more for pans 3 cups granulated sugar 1 ½ cups unsweetened Dutch-process cocoa powder 1 tablepoon baking soda 1 ½ teaspoons baking powder Coarse salt 4 large eggs 1 ½ cups low-fat buttermilk ½ cup plus 2 tablespoons safflower oil 2 teaspoons pure vanilla extract For the Caramel 4 cups granulated sugar ¼ cup light corn syrup 2 cups heavy cream Coarse salt 2 sticks cold unsalted butter, cut into tablespoons For the Frosting ¼ cup plus 2 tablespoons Dutch-process cocoa powder 2 sticks unsalted butter, room temperature ½ cup confectioners' sugar Coarse salt 1 pound semisweet chocolate, chopped, melted, and cooled Garnish: flaked sea salt, such as Maldon Directions Preheat oven to 350 degrees. Make the cake: Butter three 9-inch round cake pans, and dust with flour, tapping out excess. Sift flour, granulated sugar, cocoa, baking soda, baking powder, and 1 1/2 teaspoons coarse salt into the bowl of a mixer. Beat on low speed until just combined. Raise speed to medium, and add eggs, buttermilk, 1 1/2 cups warm water, oil, and vanilla. Beat until smooth, about 3 minutes. Divide batter among pans. Bake until cakes are set and a toothpick inserted into the center of each comes out clean, about 35 minutes. Let cool in pans set on a wire rack for 15 minutes. Turn out cakes onto racks, and let cool completely. Make the caramel: Combine granulated sugar, corn syrup, and 1/4 cup water in a medium saucepan over high heat. Cook, without stirring, until mixture is dark amber, about 14 minutes. Remove from heat, and carefully pour in cream (mixture will spatter); stir until smooth. Return to heat, and cook until a candy thermometer reaches 238 degrees, about 2 minutes. Pour caramel into a medium bowl, stir in 1 teaspoon coarse salt, and let cool slightly, about 15 minutes. Stir in butter, 1 tablespoon at a time. Let cool completely. Meanwhile, make the frosting: Whisk together cocoa and 1/4 cup plus 2 tablespoons warm water in a bowl until cocoa dissolves. Beat butter, confectioners' sugar, and a generous pinch of coarse salt in a clean bowl with a mixer on medium speed until pale and fluffy. Gradually beat in melted chocolate and then cocoa mixture until combined. Let stand for 30 minutes before using. Trim tops of cakes using a serrated knife to create a level surface. Cut each in half horizontally to form 2 layers. Transfer 1 layer to a serving platter, and spread 3/4 cup caramel over top. Top with another cake layer, and repeat with remaining caramel and cake layers, leaving top uncovered. Refrigerate until set, about 1 hour. Frost top and sides of cake in a swirling motion. Sprinkle with sea salt. Johnny Miller Cook's Notes To make this cake ahead of time: The caramel can be refrigerated for up to 3 days; bring to room temperature before using. Cake layers can be refrigerated for up to 3 days (they actually taste better when refrigerated and have a better texture for stacking). When finished, the frosted cake can be refrigerated for up to 3 days. Print