"This Texas chocolate sheet cake recipe is classic comfort food, with a rich cake and luscious frosting...."
INGREDIENTS
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4 ounces unsweetened chocolate
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1/2 cup butter (1 stick), plus 1 tablespoon for greasing the pan
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2 cups sifted flour
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2 cups granulated sugar
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1/4 teaspoon salt
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1 cup sour cream
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1 teaspoon vanilla extract
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1 1/2 teaspoons baking soda
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2 eggs, beaten
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4 ounces unsweetened chocolate
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7 tablespoons whole milk
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3 cups powdered sugar
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1 pinch salt
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1 teaspoon rum extract (you can also use vanilla extract)
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1/3 stick of butter, melted