Vinegar in pie dough: What does it do?

Pie dough via @kingarthurflour

Great pie dough is easy for some and a quest for others. Flour, salt, butter, water — how can it be so challenging? Sometimes, recipes call for one extra ingredient: a splash of vinegar in the cold water that brings the pie dough together. What does that vinegar do? The most common answer — that […]

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