Even though they’re all found in the same aisle at the grocery store, there’s one key difference between tree nuts (which include almonds, walnuts, cashews, and pistachios, to name a few) and peanuts.

Thank goodness for the pecan tree, for without it, there would be no pecans and pecan pie, one of the tastiest of all pies. And thank goodness for walnuts and walnut fudge, hazelnuts and hazelnut ...