How long does cream last after opening?
The carton of cream bought for one recipe is a five-day item. CSIRO’s refrigerated-storage guide gives cream five days in the fridge — shorter than milk’s five to seven, and given as a single figure rather than a range, so there is no cautious end to choose. Five days, counted from the day the carton came home.
How long does cream last after opening?
Five days from purchase. CSIRO’s figure does not distinguish an opened carton from a sealed one, so this site does not either: opening the carton neither resets the clock nor shortens it. A carton opened on day two for a pasta sauce has the three days that were left, and no more.
Two things can pull the date earlier. A use-by date printed on the carton that lands before day five is a safety date and wins outright. And a carton left on the bench through a long dessert course has spent part of its window in the 5°C-to-60°C danger zone, which the five days does not allow for.
Thickened, pure, double: the same answer
CSIRO lists one row for cream and does not split it by type. This site applies that five days to thickened, pure, double and pouring cream alike. The answer is identical for all four, so a carton of thickened cream is on the same clock as the pure cream beside it. Sour cream and crème fraîche are cultured products that are not on CSIRO’s table, and where the table is silent this site gives no number: the packet date is the rule.
Signs to trust
Cream announces itself. A sour smell at the spout, a sharp or bitter taste in a spoonful, or lumps that do not stir back in are the signs to trust, in that order. Cream that is simply thicker at the top of the carton is fine.
Whipped cream is a different item once it has been whipped and served. On the pavlova, it is a leftover on the three-day leftovers clock, not the five-day cream one, and it is usually the last thing anyone clears from the table.
The recipe carton
Cream is bought for a purpose more than almost anything else in the fridge: a sauce, a soup, a dessert for Saturday. The recipe uses half. The half-carton goes back on the shelf behind the milk, the purpose is over, and five days is not long enough for a second purpose to turn up on its own. It is one of the most predictable small wastes in a kitchen, and one of the easiest to catch, because the whole problem is that nobody is counting.
Pantry counts. Scan the receipt and the carton is a five-day item from that day, on a list the whole household can see. On day four, the 5:30pm nudge names the cream and a dinner that uses it — a creamy pasta, a soup finished at the stove — while there is still a dinner to put it in. The half-carton becomes the reason for Thursday’s dinner instead of Saturday’s bin.