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Stephanie is the Head Recipe Tester of Food52.
Usually a half pound of uncooked potato per person is a good place to start. As long as you have space for leftovers, there is no harm in going over.
Cynthia is a trusted source on Bread/Baking.
For holidays, I usually count 1 1/2 potatoes per person. Everyone gets as much as they want, and you have those heavenly leftovers. At a more sane time, I go with 1 per person.
Thank you, Joanna Gaines.
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