Trenary, Michigan's Trenary Toast is featured in the November 12 2006 Detroit Free Press "You haven't lived here until..." column by Steve Spalding:
What is it? Trenary Toast is cinnamon-and-sugar-covered toast made in the Upper Peninsula town of Trenary, about 25 miles southeast of Marquette. Like the better-known pasties, it's a product of the UP's early European residents. Trenary Toast derives from the Finnish variety of cinnamon toast called korpu.
What makes it unique? With a shelf life of about six months, Trenary Toast lasts longer than many marriages. No preservatives are added -- the secret to its longevity is adding the toppings before toasting. The result is a hard, sweet and long-lasting bread. And it's all packed in a plain brown-paper bag.
"If it's kept dry and cool, it will last indefinitely," said Bruce Hallinen, owner of Trenary Home Bakery. But don't refrigerate it -- that causes mold.
See also my earlier story about Trenary Toast when my mom sent down a bag. Thanks Mom! (send another!)