Big Mac fans can finally get hold of the sauce which makes the McDonald's burgers so special.
Pots of the sauce went on sale at the fast food chain earlier this week, and bottles may be given away in special contests.
They're being eagerly snapped up, with reports of people queueing for hours outside the Golden Arches to get hold of the limited edition pots.
Each pot costs 50p, and can be bought in McDonald's stores or on UberEats, Manchester Evening News reports.
But there's a small problem if you're planning on stockpiling a stash of the burger sauce.
They are only safe to eat for a small time before they become out of date.
One person tweeted: "I got 8 but then realised it states it has to be used on day of purchase - oops lol."
Another customer asked: "Says eat on day of purchase but has best before date of April?"
A spokesman for McDonald's confirmed: "The 50ml pots have a seven-day shelf life."
However, those who aren't worried about expiry dates have been heaping praise on the sauce.
One Edinburgh fan tweeted: "Lads... I just went to McDonalds purely to buy 5 tubs of Big Mac sauce... The guy was like 'Uhm, you don't want to order any food?' and I said 'no, I have my own food, I just want the sauce.'"
