One of the biggest problems with aerosol whipped topping is low yields
per can. Aerosol cans are an inexact and inefficient delivery system.
According to Encyclopedia Britannica
, "The most common type of aerosol container consists of a shell, a valve, a “dip tube” that extends from the valve to the liquid product, and a liquefied-gas propellant under pressure. The liquid product is generally mixed with the propellant. When the valve is opened, this solution moves up the dip tube and out the valve. The propellant vaporizes as it is released into the atmosphere, dispersing the product in the form of fine particles. In foam packs, such as shaving cream [or whipped topping], the propellant and product are present together as an emulsion. On release, the liquid vaporizes, whipping the whole into a foam."
The trouble is, it's very difficult to control the ratio of propellant to whipped topping with a spray can. Depending on the angle of the can and how well you shook the can to mix the emulsion, each time you depress the nozzle you could get the ideal ratio of topping and propellant expended, or the ratio could be way off, with more propellant released than is needed. In fact, if you accidentally trigger the nozzle when the can is upright, you'll release nothing but propellant – which reduces the amount of topping you'll be able to get out of the can in the future. Of course, that's assuming there was enough propellant in the can to get all the whipped topping out in the first place. It's hard to tell whether that's consistently the case.
Bagged whipped toppings such as On Top
don't suffer from disappointing yields. Thanks to the bag design, you can literally squeeze virtually 100 percent of the topping out of every unit, maximizing yield
and reducing waste. That means lower food costs in the long run.
In a test by The Culinary Edge
testing the yields of the three leading canned whipped toppings and On Top bagged whipped topping, the aerosol options averaged 81.5 percent yield, compared with 100 percent for On Top. The test involved six separate tests for each brand, at two different temperatures to verify that temperature didn't affect yield. If that's the best the spray cans could do in a controlled lab environment, how well will they do in the real world? Wouldn't you rather be assured that you'll get the best yield possible, every time?
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