INGREDIENTS
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1 cup minus1 Tablespoon all-purpose flour (see note)1
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3 Tablespoons (15g) unsweetened natural cocoa powder
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1 teaspoon baking powder
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1/2 teaspoon salt
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4 large eggs, room temperature
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1/2 cup (100g) granulated sugar
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1/4 cup (50g) packed light brown sugar
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2 Tablespoons (30ml) canola or vegetable oil
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2 Tablespoons (30ml) buttermilk
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1 teaspoon white vinegar (helps the red color stand out)
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1 Tablespoon liquid red food coloring2
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2 teaspoons pure vanilla extract
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for rolling: 1 cup (120g) confectioners' sugar