"Easy summer fruit dessert recipe...."
INGREDIENTS
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1/2 cup (1 stick) plus 1 tablespoon unsalted butter, plus extra for the pan, at room temperature
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4 firm, ripe plums, each cut into 8 wedges
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1/4 cup plus 2/3 cup granulated sugar
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1 cup all-purpose flour
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3/4 teaspoon baking powder
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1/4 teaspoon baking soda
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1/4 teaspoon kosher salt
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1 large egg
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2/3 cup sour cream
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1 teaspoon pure vanilla extract