INGREDIENTS
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1 cup unsweetened Dutch processed cocoa power
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3/4 cup hot water
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3 cups all-purpose flour
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1 tsp. baking soda
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1 tsp. baking powder
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1 1/4 tsp. salt
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3 sticks unsalted butter
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2 1/2 cups sugar
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1/2 cup amaretto liqueur
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4 large eggs
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1 tbsp. plus 1 tsp. vanilla extract
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1 cup sour cream