It is widely known as pandan and is used to flavour cakes, breads and even used in savoury dishes!
I have used it to flavour Chinese sweet soup.
Also used it in the famous Thai dish 'Pandan Chicken', recipe can be found at Kuali. I have trouble covering the chicken (I have minced the chicken) with the pandan leaves and gave up after 4 attempts (not counting those failed ones!).
Perhaps the most widely use for pandan leaves is in the making of Pandan Chiffon Cakes. I have little success with chiffon cake but planning to tackle it again soon.........Watch this space.