INGREDIENTS
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1/2 pound unsalted butter at room temperature
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2 cups sugar
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4 extra-large eggs at room temperature
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1/4 cup grated orange zest (from 4 large oranges)
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3 cups all-purpose flour plus 2 tablespoons
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1/2 teaspoon baking powder
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1/2 teaspoon baking soda
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1 teaspoon kosher salt
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1/4 cup freshly squeezed orange juice
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3/4 cup buttermilk at room temperature
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1 teaspoon pure vanilla extract
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2 cups good semisweet chocolate chunks
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Syrup:
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1/4 cup sugar
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1/4 cup freshly squeezed orange juice
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Ganache:
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8 ounces semisweet chocolate chips
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1/2 cup heavy cream
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1 teaspoon instant coffee granules