Sweet, naughty and delicious, this rum and raisin ice cream has a gorgeously smooth and silky texture. With no churning required, it is so straightforward to make, too. Condensed milk is the magic ingredient here – the thick, rich combination of sugar and milk helps to prevent any ice crystals from forming and makes the ice cream easy to scoop straight from the freezer. Soaking the raisins overnight is worth doing as this plumps them up so they are juicy. Without soaking they would be hard to eat.