The Batman Begins actress and her co-star Luke Kirby portray manic depressives on the run from a hospital in the emotional drama, and Katie admits making a home-cooked meal each night after filming was her way to relax.

"It was very intense and I actually cooked a lot on the movie because I needed to decompress," she explained on celebrity chef Mario Batali's U.S. cooking show The Chew. "I even baked a little. I made a blueberry pie, a lot of pastas and things..."

Katie reveals she shares the hobby with her daughter Suri, with ex-husband Tom Cruise, and the nine-year-old has taken well to whipping up fresh Italian food with mum.

"We just did a little class together and she loves making ravioli...," the proud mum said. "We were at Eataly (Batali's Italian food market in New York City) and we learned how to make meatballs, which was amazing..."