"These little treats were made famous by writer Marcel Proust...."
INGREDIENTS
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1/3 cup plus 1 tbsp sugar
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1/4 tsp baking powder
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2 large eggs, at room temperature
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1/8 tsp salt
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1 tsp pure vanilla extract
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4 tbsp butter, melted, and cooled until tepid, plus more for the pan
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1/3 cup plus 2 tbsp all-purpose flour
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confectioner’s sugar, to garnish