The world's first test-tube burger was grown from stem cells from a cow; it will hit London plates next week.

The burger cost over $380,000 to develop, CNN reported.

It was " made from 20,000 strips of cultured meat mixed together with lab-grown animal fat," it took nine months to grow.

Researchers hope the lab-grown burger will help satisfy the global demand for meat.

"There's no doubt it would be revolutionary in the way we produce staple food," Mark Post, from the University of Maastricht, said.

The only problem is the length of time it takes for the burger to grow.

 "It depends how much resources are put into the production of cultured meat. It will always take this long for cells to multiply, but we could produce a million burgers in this time if enough resources were being spent on the production," Post said.

The global demand for meat is set to double over the next 40 years, according to the World Health Organization (WHO) via CNN. Current meat production methods will mostly likely not be able to meet those needs.

The test-tube meat could also aid in reducing greenhouse gas emissions produced by current farming.

If all goes well, scientists predict the unusual meat could be on supermarket shelves within a decade.

"Five years might be too early and 10 years sounds more realistic, if we spend a lot of resources on pushing the production of cultured meat forward," Post said.

The first tasting of the meat can be watched live on August 5.

"The whole presentation next week will be a proof of concept," Post said. Of course we're not there yet to make it an efficient and cheap product. But I want to show that it can be done so that people see: "Yes you can eat it, yes, it tastes good.'