INGREDIENTS
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1 1/2 cups all-purpose flour
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1 1/2 teaspoons baking powder
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1/4 teaspoon salt
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1/2 cup (1 stick) unsalted butter, at room temperature
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1 cup sugar
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2 large eggs, at room temperature
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2 limes, zested and juiced
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1/4 teaspoon vanilla extract
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1/2 cup buttermilk, at room temperature
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1 tablespoon tequila (for brushing the tops, if desired)
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Tequila-Lime Buttercream
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1 cup (2 sticks) unsalted butter, at room temperature
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2 3/4 - 3 cups confectioners' sugar
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1 1/2 tablespoons freshly squeezed lime juice
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1-2 tablespoons tequila
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pinch salt