"Originally created in the early 1900s by the Sanders Chocolates company in Detroit (where the ice cream float was also invented), this cake sports a poured fudge frosting over “bumps” of vanilla buttercream, creating the name by which Midwesterners have known and loved it for many years: Bumpy Cake...."
INGREDIENTS
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1/2 cup Dutch-process cocoa
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1/2 cup hot brewed coffee or water
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1/2 cup vegetable oil
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1 cup buttermilk
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1 1/2 teaspoons baking soda
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1/2 teaspoon salt
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2 teaspoons vanilla extract
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2 large eggs
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1 3/4 cups granulated sugar
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2 cups King Arthur Unbleached All-Purpose Flour
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6 tablespoons unsalted butter, at room temperature
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1/8 teaspoon salt
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2 cups confectioners' sugar, sifted
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1 teaspoon vanilla extract
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1 to 2 tablespoons milk or half & half, as needed
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1/2 cup buttermilk
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2 tablespoons dark corn syrup
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8 tablespoons (1/2 cup) unsalted butter
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1/2 cup Dutch-process cocoa
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1/4 teaspoon salt
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4 cups confectioners' sugar, sifted
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1 teaspoon vanilla extract