Chef John's Dutch Babies
Ingredients:
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⅔ cup milk, room temperature
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½ cup packed all-purpose flour
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3 large eggs, room temperature
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¼ teaspoon vanilla extract
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¼ teaspoon salt
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3 tablespoons clarified butter
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1 tablespoon butter
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½ Meyer lemon, juiced
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1 tablespoon confectioners' sugar, or to taste