INGREDIENTS
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Cooking spray, for pans
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1 c. (2 sticks) butter, softened
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1 c. sugar
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2 large eggs
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1 tsp. pure vanilla extract
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2 1/2 c. all-purpose flour
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1/4 c. Dutch-processed cocoa powder
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1 tsp. baking soda
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1 tsp. kosher salt
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1 c. buttermilk
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2 tsp. distilled white vinegar
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2 tbsp. red food coloring
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3 (8-oz) blocks cream cheese, softened
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6 c. powdered sugar
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2 tsp. pure vanilla extract
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1/4 tsp. kosher salt