A lot of liqueurs and cordials, like crème liqueurs, may spoil and become undrinkable after a year or more. Even if your bottle isn't on the verge of spoiling, it's best to store them strictly according to their storage guidelines. Because they can lose their flavors over just a few months, if opened.

How long can you store liqueurs?

It should be noted that liqueurs — sweetened, distilled spirits with added flavors, such as fruit, spices, or herbs — will last up to 6 months after opening. Cream liqueurs should be kept cold, ideally in your fridge, to extend their shelf life (4, 5).

How can you tell if liquor has gone bad?

When it comes to spirits, you'll be able to spot a spoiled one easily (smell, color), although that happens extremely rarely. In case of liquors look for color changes, crystallizing sugar, curdling, etc. If a liqueur is bad, it should smell pretty bad. Last thing you can do is to taste a bit.