Ranbir Kapoor is cooking up a storm for Alia Bhatt

Alia Bhatt and Ranbir Kapoor are busy reading the script of friend Ayan Mukerji's next, Brahmastra.

A source says that Kapoor, who has started testing his culinary skills, treats Bhatt and Mukerji to his hand-cooked delicacies whenever they drop in at his home to discuss the film.