"Somehow, Texas claimed the sheet cake as its own in the mid-20th century, perhaps because of the pecans, an ingredient that grows in abundance throughout the Lone Star State. The defining element is its shape--and, of course, the icing, which has to be heated and poured on the warm, just-out-of-the-oven cake. The result is a rich, chocolaty treat that's iconic in Texas...."
INGREDIENTS
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1 1/2 cups spicy, fruity cola soft drink (such as Dr Pepper)
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1 cup vegetable or canola oil
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1/2 cup unsweetened cocoa
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2 cups all-purpose flour
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1 cup granulated sugar
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1 cup firmly packed light brown sugar
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1 1/2 teaspoons baking soda
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1/2 teaspoon table salt
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1/2 cup buttermilk
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2 large eggs, lightly beaten
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2 teaspoons vanilla extract
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1 1/4 Vegetable cooking spray
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cups chopped toasted pecans