Disneyland Paris officially announced the attraction in March 2013.
The attraction was revealed as part of internet rumours of an expansion of Walt Disney Studios Park's Toon Studio area. Other rumours about the expansion included a reincarnation of the popular Toy Story Midway Mania! attraction to be put in the operating Toy Story Playland. Ratatouille: L’Aventure Totalement Toquée de Rémy is one of the biggest additions to Disneyland Paris, with the show building being of similar height to the expansive Pirates of the Caribbean attraction at the neighbouring Disneyland Park, and cost an estimated $270 million to complete. Following the initial rumours, articles on the Internet surfaced concept paintings, ride blueprints, and images of the first phases of construction, confirming that there would be such an attraction.
The attraction was formally announced in March 2013 at the Euro Disney S.C.A. annual shareholders meeting with construction completed in June 2014. On 21 June 2014 the attraction was officially inaugurated by President and CEO of The Walt Disney Company, Robert Iger. The attraction fully opened to the public on 10 July 2014.
The attraction's exterior is that of Gusteau's restaurant, and the surrounding buildings of the Parisian plaza.
After queuing on the rooftops of Paris, guests board their "ratmobiles" and find themselves "shrunk" down to rat size on the roof of Gusteau's restaurant, with Remy and his imaginative Chef Gusteau trying to decide what meal they shall serve the riders. After deciding on their famous Ratatouille dish, Rémy and the riders fall through a swinging roof glass-pane, winding up on the restaurant kitchen floor. This starts a chase sequence with Rémy leading the riders and other rats away from the cooks, passing through the cold room and under the hot oven.
The little group eventually ends up in the dining area, attracting attention from customers and causing a riot. Chef Skinner tries to get rid of the rats and the guests, while Chef Linguini tries to help them escape into a nearby vent. The subsequent escape in the walls is undermined by Chef Skinner's angry attempts to grab the rats or the guests through the venting grids. In the end, the little group makes it safely to Rémy's kitchen, where the cooking of the Ratatouille is ongoing.