Well the cream doesnt have to be sweetened, or condensed.
One time in my FACE class (food, and consumer economics.) i made homemade icecream with cream, sugar (optional technically) vanilla (also optional, its just for flavor), and ice.
You place everything but ice in a ziplock bag, (close it) then place the ice in a different, bigger, ziplock back, and then place the small bag inside the ice bag. Close the big bag, and shake it untill you get icecream.
Step-by-step explanation:
Yum? My bag popped, so i dont actually know if it tastes good. My friend liked it though.