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Ingredients

• For the cake
• 4 ounces best-quality unsweetened chocolate, coarsely chopped
• 1/2 cup vegetable or canola oil
• 2 cups sugar
• 1 cup plus 2 tablespoons all-purpose flour
• 3 tablespoons plus 1 teaspoon best-quality unsweetened Dutch-process cocoa powder
• 3/4 teaspoon baking soda
• 1/2 teaspoon salt
• 1/2 cup sour cream
• 2 large eggs
• 3/4 cup hot strong brewed coffee
• For the chocolate ganache frosting
• 12 ounces best-quality semisweet (58%) chocolate
• 1 cup heavy cream
• 2 tablespoons light corn syrup
• For the brownie crumble
• 4 Chocolate Walnut Brownies (see recipe below)
• 1/4 cup walnut pieces (optional)
• 1/2 pound (2 sticks) unsalted butter
• 4 ounces best-quality unsweetened chocolate, coarsely chopped
• 2 large eggs
• 1 1/2 cups sugar
• 1 teaspoon pure vanilla extract
• 1 cup all-purpose flour
• 1/2 teaspoon kosher salt
• 2/3 cup walnuts, coarsely chopped (optional)

Description

Serious Eats