How long does whipped ganache last?
Likewise, does whipped ganache need to be refrigerated?
Classic ganache can generally stay at room temperature for 2 days, as long as it's kept in a cool place, and then it must be refrigerated, where it can stay for up to a month. Let it stand at room temperature to warm up. Thaw in the refrigerator, and then let stand at room temperature to warm up.
Keeping this in consideration, does whipped ganache set hard?
It will set up to be very firm, and you'll need to work quickly so it doesn't cool so much you can't pipe it. To make truffles, pop the ganache into the refrigerator and stir it every 5 minutes until it's thick and cool, but not completely hardened. Whipped ganache frosting. Dipping.
Ganache goes bad because moisture in the cream promotes microbial growth. A typical ganache lasts about two weeks in the fridge, or two days on the counter. However, while all ganaches contain some water from the cream, most of that water is chemically unavailable because it's bound up with other ingredients.