How long can aerosol whipped cream be out of the refrigerator?
Freshly whipped cream begins to loose volume and liquify quickly
unless stabilized during whipping with a product like "Whip-It" or
plain gelatin. (For each cup of cream, soften 1/2 t. gelatin in 1
T. cold water; heat for a few seconds in a microwave to dissolve,
then cool to room temperature before adding to the cream during
whipping.) Cream may be whipped without a stabilizer and chilled
for a few hours, however. This will require whisking briefly by
hand or machine immediately before serving to reincorporate liquid
and regain lost volume.