INGREDIENTS
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1 cup cornstarch
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3/4 cup all-purpose flour, plus more as needed
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1 teaspoon baking powder
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1/2 teaspoon baking soda
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1/4 teaspoon fine salt
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8 tablespoons unsalted butter (1 stick), at room temperature
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1/3 cup granulated sugar
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2 large egg yolks
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1 tablespoon pisco or brandy
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1/2 teaspoon vanilla extract
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1 cup Dulce de Leche, at room temperature
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Powdered sugar, for dusting