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Bumpy Cake

Ingredients

• Cake
• 1/2 cup (43g) Dutch-process cocoa
• 1/2 cup (113g) brewed coffee or water, hot
• 1/2 cup (99g) vegetable oil
• 1 cup (227g) buttermilk, at room temperature
• 1 1/2 teaspoons baking soda
• 1/2 teaspoon salt
• 2 teaspoons King Arthur Pure Vanilla Extract
• 2 large eggs, at room temperature
• 1 3/4 cups (347g) granulated sugar
• 2 cups (240g) King Arthur Unbleached All-Purpose Flour
• Buttercream
• 6 tablespoons (85g) unsalted butter, at room temperature
• 1/8 teaspoon salt
• 2 cups (227g) confectioners' sugar, sifted
• 1 teaspoon King Arthur Pure Vanilla Extract
• 1 to 2 tablespoons (14g to 28g) milk or half-and-half, as needed
• Fudge Frosting
• 1/2 cup (113g) buttermilk
• 2 tablespoons (39g) dark corn syrup
• 8 tablespoons (113g) unsalted butter
• 1/2 cup (43g) Dutch-process cocoa
• 1/4 teaspoon salt
• 4 cups (454g) confectioners' sugar, sifted
• 1 teaspoon King Arthur Pure Vanilla Extract

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