INGREDIENTS
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1/2 cup all-purpose flour
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1/2 cup packed light brown sugar
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1/4 cup cold butter, cut into cubes
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1 tsp vanilla extract
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1 cup all-purpose flour
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1/4 cup cake flour
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1 teaspoon baking powder
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1/4 teaspoon baking soda
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1/4 teaspoon salt
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3/4 cup mini semisweet chocolate chips, divided
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1/2 cup (1 stick) unsalted butter
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3/4 cup granulated sugar
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2 eggs
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1 teaspoon vanilla extract
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1/2 cup buttermilk
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powdered sugar, for topping