About the White Powder

What the white powder is

While hoshiimo is stored, sugars inside (such as maltose) can seep to the surface, dry, and form white crystals. That's what the powder is, and it's said to appear more readily on sweeter hoshiimo. The powder itself isn't considered a sign of any problem with quality.

Telling it from mold — general pointers

These general differences are well known:

• White powder: a thin, even, dry coating across the whole surface; it comes off when rubbed
• Possible mold: patchy or fuzzy raised spots; green, blue, black, or pink coloring
• Possible mold: sour or other off smells, sliminess, stringiness

When in doubt

If you notice colored spots, an off smell, sliminess, or anything else unusual, don't eat it — check with the seller you bought it from. Even when looks alone don't settle it, it's recommended not to force it. Check the storage instructions and date on your package as well.