Which comes first when mashing potatoes the butter or the milk? How do you roast a turkey so the breast is as moist and juicy as the legs? Is it possible to create a fudgy, cakey, chewy brownie all in one? Pam Anderson, executive editor of the highly successful magazine COOK'S ILLUSTRATED, painstakingly conducted test after test to arrive at not only the best recipe but frequently the most convenient and sensible one.