INGREDIENTS
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1/2 cup (1 stick) butter, at room temperature
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1 1/2 cups granulated sugar
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3 eggs
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1 teaspoon vanilla
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1 1/2 Tablespoons red food coloring
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1 1/4 cups all-purpose flour
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1/4 cup cocoa powder
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a pinch of salt
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1/2 teaspoon baking soda
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1 1/2 teaspoons cider vinegar
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1/2 cup buttermilk
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For the Glaze:
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1 cup powdered sugar
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1 Tablespoon buttermilk