INGREDIENTS
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1 cup of unsalted butter, room temperature
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1 3/4 cup sugar
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4 eggs
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2 teaspoons of vanilla extract
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1 teaspoon of baking soda
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3 cups of cake flour
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2 teaspoons of cinnamon
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A pinch of salt
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3/4 cup of sour cream
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1 cup of blackberry preserves (do not use jelly)
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1/2 cup of blackberry preserves
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1 1/2 cups of powdered sugar.