A Dutch scientist using a private donation of $325,000 to create a burger made of muscle strips grown in a lab is ready to cook the meat at a public showcase in London.

Earlier reports expected Dr. Mark Post, a Dutch scientist at Maastricht University, to cook the five-ounce hamburger in London sometime this summer. NBC News reports a media alert released by Ogilvy Public Relations announced the burger made of 20,000 muscle strips will be cooked in front of an invited audience in London on Aug. 5.