Did it help the bread stay fresh? Not really, although historically, it did help to keep mice away in homes that had critters (not Nana’s home, of course).
While there are some airtight plastic bread boxes today, the box is still full of air, a staunch enemy of baked goods.
Fresh-baked bread begins to lose moisture in a continuous process known as starch retrogradation, a hardening of the starch molecules as the water that was absorbed during baking begins to dry out. Without preservatives, a loaf of bakery bread will harden to the point of staleness in 24 to 48 hours.
Toasting, microwaving or otherwise reheating bread brings back some moisture—briefly—because the hot bread reabsorbs some moisture.
If you buy branded supermarket breads, they typically contain preservatives that retard starch retrogradation and mold growth for three weeks or more.
For all-natural bakery breads, made without preservatives, we rely on bread storage bags.
It’s moist and delicious today, but what about two days from now? Photo courtesy KingArthurFlour.com.
MORE TIPS FOR KEEPING BREAD FRESH LONGER
Short-Term Solution: Airtight Plastic Bags
If you’ll eat the bread within two or three days, keep it in an airtight plastic bag on the counter. By day three it may need some freshening in the microwave (5-10 seconds), or you can toast it.
Longer-Term Solution: Freeze It (In Airtight Plastic Bags)
Freezing prevents the growth of mold and stops starch retrogradation. You can store bread, bagels, baguettes—almost any bread—in the freezer for a couple of months.
While bread will keep frozen longer than that, it’s one of the first foods to pick up unwanted flavors from a less-than-pristine environment.
Check out our photo-filled Bread Glossary.
Related Food Videos: For more food videos, check out The Nibble's Food Video Collection.