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Why Should I Refrigerate a Blanched French Fry?

Q:

In cooking school, after blanching our French fries, we left them in the refrigerator (or even the freezer) before the final fry. How does refrigerating a blanched French fry create a better final product?

A:

This technique gives the potato a chance to set-up, or rest. The cooled potato glazes over the outside surface cells and this seal creates an extra crispy fry with the finish frying cycle.