Unfortunately for all those smacking their chops at the thought of tucking into this glistening golden pile of potato (and oil and dextrose), the Mega Potato will - initially - only be available in Japan. Launched in restaurants across the country today, the sumo-sized portion of fries will retail for 490 yen (£3.20).
The limited edition serving of chips is double the size of the current 'large' portion, containing a stomach-churning 1,142 calories. That's over half the entire recommended daily calorie intake for women.
Compared to other staples of the McDonald's menu, the Mega Potato is a monster. Large french fries contain 460 calories; a plain hamburger just 250; the double cheeseburger 440; the sausage and egg McMuffin has 430. Even the Big Mac contains a relatively puny 490 calories.
McDonald's insists that the Mega Potato has been introduced as a 'sharing option'. But if these supersized fries make it to our shores, MT reckons it could replace the McGangBang (a Chicken Mayo inserted inside a Double Cheeseburger), as the competitive eating choice for drunken louts and rugger buggers across the UK.