Melba Toast Day

What the day is

Melba toast is bread sliced thin, toasted, split through the middle while hot, and toasted again on the cut side until it curls and dries completely. Its day is observed on February 23. It shares a namesake with the peach dessert marked in January, both created for the singer Nellie Melba.

Origin and background

The double toasting is not fussiness, and it connects to something counterintuitive about bread.

Stale bread has not simply lost water. The main process is retrogradation: the starch molecules gelatinized during baking gradually recrystallize into a more ordered structure as the loaf sits, and that reorganization is what makes the crumb firm and crumbly. The proof is that stale bread can be refreshed by heating, which reverses some of the crystallization and briefly restores softness, something drying alone could never explain. It is also why bread stales fastest in the refrigerator, where the temperature sits in the range that favors recrystallization, and why the freezer preserves it well by skipping straight past that range.

Melba toast sidesteps the whole problem by removing nearly all the water in the second toasting. With almost no moisture present the starch has nothing to reorganize around, so it cannot stale in the usual sense. What ends it instead is picking up humidity from the air, which is why it must be stored airtight, and why a piece left out overnight turns soft rather than hard.

The thinness matters for the same reason: a thick slice retains moisture at its center and will not dry through.

How to take part

• Make it properly: toast, split while hot, then toast the cut sides until curled.
• Use day-old bread, which slices thinner and more cleanly than fresh.
• Store it airtight the moment it cools.
• Freeze bread rather than refrigerating it, which stales it faster.
• Refresh a stale loaf in the oven and notice it come back.