Not made this for a while but it is lovely - I use a tbsp of flavoured syrup in mine instead of the vanilla - Put the condensed milk, cream and vanilla into a large bowl. Beat with an electric whisk until thick and quite stiff, a bit like clotted cream. Scrape into a freezer container or a large loaf tin, cover with cling film and freeze until solid.
Homemade ice cream once required churning by hand, but with the invention of electric ice cream makers, manual labor is reduced. The Rival electric ice cream maker automatically turns the tub of ice cream inside of a large bucket of ice. This freezes the ice cream in 25 to 40 minutes.