Wood-burning pizza ovens are apparently all the rage with celebrity owners including Oscar-winning actress Gwyneth Paltrow and Sherlock Holmes director Guy Ritchie.
Oliver used one of the ovens in his hit Channel 4 series ‘Jamie at Home'.
The TV chef launched a ‘Wood-Fired Ovens by Jamie Oliver' range at the Children's Society Garden at Chelsea Flower Show.
Jamie Oliver said: "It is a lovely oven. I have done a lot of cooking in it.
"It has got a bit fashionable because it is outside, sociable and a bit of a laugh. Food tastes better in it.
I find these ovens tend to get people's imaginations going. To my mind, wood-fired ovens represent the ultimate foodie must-have.
Their dry heat and stone base crisps up a pizza like you wouldn't believe. But there are thousands of other beautiful things you can make in them.
I'm talking perfect roast chicken, crispy crackling and pork chops, seared scallops, baked breads and even an overnight melt-in-the-mouth stew."
Oliver supported one of several show gardens to boast an outdoor kitchen areas at this year's Chelsea.
With Mediterranean-style, outdoor living the height of fashion, this year's gardens also feature lounges, bars, plunge pools, spas and even showers.
Oliver appeared at Monday's launch of charity The Children Society's garden that is intended to be an urban, chill-out retreat for teenagers.
They can hang out in a curtained pavilion or shady seating area under trees, play around a plunge pool, talk around an open fire - and munch on pizzas straight from the oven.
The charity's garden was created by Chelsea double gold medal-winning designer Mark Gregory, who won a further gold for his 2010 design.
Mark Gregory said: "We are very happy that Jamie is going to be cooking pizzas in our garden and giving them out.
"It is a nice fit between the charity and Jamie's work with under-privileged children.
"I have tried to create a cool, outdoor place for teenagers to hang out either in private with their mates away from their parents or with their family.
"There are ferns and foxgloves and some of the usual Chelsea glamour but the pavilion with scatter cushions and bean bags and plunge pool are somewhere teenagers can have fun."
Gregory added: "These ovens are the new barbecues and more functional. You can cook a lot more on them.
"And hanging out in the garden is like eating pizza on the sofa. You can shove anything in this oven and relax."
The Trailfinders and Fleming's Nurseries Australian garden by Scott Wynd is a luxury outdoor living pod complete with sunken lounge and kitchen area, spa, swimming pool and poolside bar.
Similarly, the Kebony Naturally Norway garden by Darren Saines has a kitchen, daybed, shower of unmistakably Scandinavian design and a water feature to represent the Norwegian fjords.