INGREDIENTS
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for the cake
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2 1/2 cups cake flour, plus extra for dusting pans
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1 1/4 teaspoons baking powder
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1/4 teaspoon baking soda
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3/4 teaspoon table salt
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1 3/4 cups sugar (divided)
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10 tablespoons unsalted butter, melted and cooled slightly
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1 cup buttermilk, room temperature
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3 tablespoons vegetable oil
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1 teaspoons vanilla extract
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1/2 tsp almond extract
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6 large egg whites, room temperature (divided)
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for the flour buttercream
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4½ tablespoons all-purpose flour
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large pinch of salt
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1 cup milk
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1 cup granulated sugar
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2 sticks (1 cup) unsalted butter, at room temperature, cut into pieces
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1/2 teaspoon vanilla extract
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1/4 teaspoon almond extract (optional)