"Tender, buttery sandwich-size sourdough biscuits...."
INGREDIENTS
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1 cup King Arthur Unbleached All-Purpose Flour
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2 teaspoons baking powder
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3/4 teaspoon salt
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1/2 cup (8 tablespoons) cold unsalted butter
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1 cup sourdough starter, unfed/discard*
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*See "tips," below.