Why do crumbs left in jars and spreads from toast not go moldy, while bread will go moldy by itself in a few days?

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Why do crumbs left in jars and spreads from toast not go moldy, while bread will go moldy by itself in a few days?

In: Chemistry
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Crumbs have enough surface area to completely dry out.

My original comment wasn’t long enough, so I will say that bread and cookies and the like have more moisture and less surface area.

Ew, who leaves crumbs in jars and spreads. Take enough out to spread on your bread or use a different knife.

Also didn’t ou just answer your own question? Toast not bread. Toast has been cooked/dried out

Most spreads are *loaded* with sugar, and preservatives. Mold and bacteria have a hard time dealing with high concentrations of sugar, it’s a natural preservative. Add some artificial preservative to that and it’ll take a lot for it to go bad. If you immerse a breadcrumb into this, it’ll absorb these preservatives.